Sequential Convoy pattern using ServiceBus Sessions suddenly errors out

[niphlod]

Severity

P1 - Critical (Blocking production)

Describe the Bug with repro steps

Expected behaviour:

• one run for each session, fetching messages sequentially, each run processes its own session serially, but all sessions are processed in parallel

Actual behaviour:

• since a few days, no runs happen. On the triggers run, triggers are reporting to fail unexpectedly with "InternalServerError"

What type of Logic App Is this happening in?

Standard (VSCode)

Are you experiencing a regression?

Worked til 6 Nov 2025

Which operating system are you using?

Windows

Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

Workflow JSON

Screenshots or Videos

No response

Environment

• Browser : last Edge as of November 2025
• VSCode: 1.105.1
• Extension: 5.185.10

Additional context

Workflow is largely based off the official template for sequential convoys, albeit the template is slightly wrong

Azure/LogicAppsUX#8562

Do I need to open a support case in MS to see why triggers are suddenly failing ?