Not being able to login has been narrowed down to having Chrome Browser installed on the box
Once users uninstalled Chrome Browser, the login issues went away
Google seems to be making a lot of changes lately and causing issues for a lot of different things.
Keep in mind Chrome browser is a Mobile app, you cannot get it from the TV App store. Could be some correlation there.
Starting this week we have resorted to Pre Installing Firefox instead of Chrome on brand new Android 11 boxes, as the support tickets kept growing.