Nested bard set causes re-render and data loss

[helloiamlukas]

Bug description

When a Bard field contains another Bard field inside a set, typing in one section makes the whole Bard field refresh. Sibling sections re-render and sets can disappear.

How to reproduce

1. Clone repository: https://github.com/helloiamlukas/nested-bard-bug
2. Open /cp/collections/articles/entries/7ac0bdda-1b84-45f8-ac52-2575dd7e8251 in browser
3. Click into the first section, put the cursor after its image, and type.

Logs

Environment

Environment
Laravel Version: 13.12.0
PHP Version: 8.3.22
Composer Version: 2.9.7
Environment: local
Debug Mode: ENABLED
Maintenance Mode: OFF
Timezone: UTC
Locale: en

Cache
Config: NOT CACHED
Events: NOT CACHED
Routes: NOT CACHED
Views: CACHED

Drivers
Broadcasting: log
Cache: file
Database: sqlite
Logs: stack / single
Mail: log
Queue: sync
Session: file

Storage
public/storage: NOT LINKED

Statamic
Addons: 0
License Key: Not set
Sites: 1
Stache Watcher: Enabled (auto)
Static Caching: Disabled
Version: 6.20.0 Solo

Installation

Starter Kit using via CLI

Additional details

No response