Sequential Convoy pattern using ServiceBus Sessions suddenly errors out

### 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

```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

https://github.com/Azure/LogicAppsUX/issues/8562

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