Authentication Issues - Continually tries to have me login
I'll update this next time I see it happen on my phone... It'll be a bit vague now since the report is all from memory.
When opening the Teams app I am prompted to log back in. If I try to log back in the app will go into a loop of trying to sign on and it'll flash up a bunch of screens that typically go away before I can understand what it says.
If I hit back, it'll often take me to my messages, which may be out of sync because I'm not actually authenticated.