[Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103

Open
Bug
Open
[Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
Bug
Labels
bugSomething isn't workinghelp wantedExtra attention is neededsev medium

Description

@derrickmehaffy
derrickmehaffy
opened on Mar 15, 2026

Description

When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.

Steps to Reproduce

  1. Install HyperFactions without BetterMap
  2. Open world map — no POI markers visible (expected)
  3. Install BetterMap (v1.3.3+) alongside HyperFactions
  4. Open world map — pink tent POI markers now visible in explored areas

Expected Behavior

POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).

Root Cause

BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.

Current Workaround

Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.

Proper Fix

Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:

Proposed API summary

We've proposed three interfaces to the BetterMap team:

  1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.

  2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.

  3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.

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    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

    Skip to content
    [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103
    Open
    Bug
    Open
    [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
    Bug
    Labels
    bugSomething isn't workinghelp wantedExtra attention is neededsev medium
    Description
    @derrickmehaffy
    derrickmehaffy
    opened on Mar 15, 2026
    Description
    When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.
    Steps to Reproduce
    1. Install HyperFactions without BetterMap
    2. Open world map — no POI markers visible (expected)
    3. Install BetterMap (v1.3.3+) alongside HyperFactions
    4. Open world map — pink tent POI markers now visible in explored areas
    Expected Behavior
    POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).
    Root Cause
    BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.
    Current Workaround
    Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.
    Proper Fix
    Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:
    Proposed API summary
    We've proposed three interfaces to the BetterMap team:
    1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.
    2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.
    3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.
    Related
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, 'i');
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

      Skip to content
      [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103
      Open
      Bug
      Open
      [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
      Bug
      Labels
      bugSomething isn't workinghelp wantedExtra attention is neededsev medium
      Description
      @derrickmehaffy
      derrickmehaffy
      opened on Mar 15, 2026
      Description
      When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.
      Steps to Reproduce
      1. Install HyperFactions without BetterMap
      2. Open world map — no POI markers visible (expected)
      3. Install BetterMap (v1.3.3+) alongside HyperFactions
      4. Open world map — pink tent POI markers now visible in explored areas
      Expected Behavior
      POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).
      Root Cause
      BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.
      Current Workaround
      Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.
      Proper Fix
      Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:
      Proposed API summary
      We've proposed three interfaces to the BetterMap team:
      1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.
      2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.
      3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.
      Related
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        Bug
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        No milestone
        Relationships
        None yet
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        No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103
        Open
        Bug
        Open
        [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
        Bug
        Labels
        bugSomething isn't workinghelp wantedExtra attention is neededsev medium
        Description
        @derrickmehaffy
        derrickmehaffy
        opened on Mar 15, 2026
        Description
        When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.
        Steps to Reproduce
        1. Install HyperFactions without BetterMap
        2. Open world map — no POI markers visible (expected)
        3. Install BetterMap (v1.3.3+) alongside HyperFactions
        4. Open world map — pink tent POI markers now visible in explored areas
        Expected Behavior
        POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).
        Root Cause
        BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.
        Current Workaround
        Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.
        Proper Fix
        Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:
        Proposed API summary
        We've proposed three interfaces to the BetterMap team:
        1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.
        2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.
        3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.
        Related
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        Metadata
        Assignees
        No one assigned
          Labels
          bugSomething isn't workinghelp wantedExtra attention is neededsev medium
          Type
          Bug
          Projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
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})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103
          Open
          Bug
          Open
          [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
          Bug
          Labels
          bugSomething isn't workinghelp wantedExtra attention is neededsev medium
          Description
          @derrickmehaffy
          derrickmehaffy
          opened on Mar 15, 2026
          Description
          When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.
          Steps to Reproduce
          1. Install HyperFactions without BetterMap
          2. Open world map — no POI markers visible (expected)
          3. Install BetterMap (v1.3.3+) alongside HyperFactions
          4. Open world map — pink tent POI markers now visible in explored areas
          Expected Behavior
          POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).
          Root Cause
          BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.
          Current Workaround
          Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.
          Proper Fix
          Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:
          Proposed API summary
          We've proposed three interfaces to the BetterMap team:
          1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.
          2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.
          3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.
          Related
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            bugSomething isn't workinghelp wantedExtra attention is neededsev medium
            Type
            Bug
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            Milestone
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            None yet
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            No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103
            Open
            Bug
            Open
            [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
            Bug
            Labels
            bugSomething isn't workinghelp wantedExtra attention is neededsev medium
            Description
            @derrickmehaffy
            derrickmehaffy
            opened on Mar 15, 2026
            Description
            When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.
            Steps to Reproduce
            1. Install HyperFactions without BetterMap
            2. Open world map — no POI markers visible (expected)
            3. Install BetterMap (v1.3.3+) alongside HyperFactions
            4. Open world map — pink tent POI markers now visible in explored areas
            Expected Behavior
            POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).
            Root Cause
            BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.
            Current Workaround
            Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.
            Proper Fix
            Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:
            Proposed API summary
            We've proposed three interfaces to the BetterMap team:
            1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.
            2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.
            3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.
            Related
            Metadata
            Metadata
            Assignees
            No one assigned
              Labels
              bugSomething isn't workinghelp wantedExtra attention is neededsev medium
              Type
              Bug
              Projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103
              Open
              Bug
              Open
              [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
              Bug
              Labels
              bugSomething isn't workinghelp wantedExtra attention is neededsev medium
              Description
              @derrickmehaffy
              derrickmehaffy
              opened on Mar 15, 2026
              Description
              When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.
              Steps to Reproduce
              1. Install HyperFactions without BetterMap
              2. Open world map — no POI markers visible (expected)
              3. Install BetterMap (v1.3.3+) alongside HyperFactions
              4. Open world map — pink tent POI markers now visible in explored areas
              Expected Behavior
              POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).
              Root Cause
              BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.
              Current Workaround
              Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.
              Proper Fix
              Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:
              Proposed API summary
              We've proposed three interfaces to the BetterMap team:
              1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.
              2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.
              3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.
              Related
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                bugSomething isn't workinghelp wantedExtra attention is neededsev medium
                Type
                Bug
                Projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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                [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them #103
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                [Bug] POI markers visible when BetterMap is installed despite HyperFactions hiding them#103
                Bug
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                bugSomething isn't workinghelp wantedExtra attention is neededsev medium
                Description
                @derrickmehaffy
                derrickmehaffy
                opened on Mar 15, 2026
                Description
                When BetterMap is installed alongside HyperFactions, POI markers (Kweebec camps, villages, etc.) appear on the world map despite HyperFactions normally hiding them. Without BetterMap, these POIs are hidden because our generatePointsOfInterest() returns an empty map.
                Steps to Reproduce
                1. Install HyperFactions without BetterMap
                2. Open world map — no POI markers visible (expected)
                3. Install BetterMap (v1.3.3+) alongside HyperFactions
                4. Open world map — pink tent POI markers now visible in explored areas
                Expected Behavior
                POI visibility should be consistent whether BetterMap is installed or not. Ideally, faction mods should be able to selectively control POI visibility (e.g., hide POIs in enemy territory, show in friendly territory).
                Root Cause
                BetterMap wraps the native POIMarkerProvider with its own PoiPrivacyProvider, which discovers and caches POIs independently from HyperFactions' generator. By the time our delayed registration replaces the generator (which returns empty POIs), BetterMap has already captured the original POI data.
                Current Workaround
                Set hideAllPoiOnMap: true in BetterMap's config.json. This is all-or-nothing — no per-faction filtering.
                Proper Fix
                Requires a MapMarkerFilter API from BetterMap that allows external mods to filter POI/warp/spawn markers based on custom logic (e.g., faction territory ownership). This has been proposed upstream:
                Proposed API summary
                We've proposed three interfaces to the BetterMap team:
                1. PlayerVisibilityFilter — A @FunctionalInterface that external mods register on PlayerRadarManager to control per-viewer/per-target radar visibility. Multiple filters stack with AND logic. This would replace the HiddenPlayersManager workaround we currently use.
                2. ExplorationSharingProvider — Allows faction/team/party mods to share explored chunks between members, so faction territory appears explored for all members.
                3. MapMarkerFilter — Allows external mods to filter non-player markers (POIs, warps, spawn, death) based on custom logic like faction territory ownership. This is what would fix this specific issue.
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