Managing sound and video settings during Teams meetings and calls
Interestingly, I've narrowed down my particular problem to settings.json in %USER_HOME%\AppData\Roaming\Microsoft\Teams\
If I quit Teams, delete that file and re-start Teams, the problem is gone - until eventually it comes back again.
The settings.json file appears to mutate quite a bit as I'm using Teams - something happens there that creates the issue for me.
I've tried to JSON diff a working file with another which introduces the issue, but there are far too many changes to try to isolate a single problem, and one would need a certain understanding of how the contents in this file are structured, maintained and interpreted by Teams