Reliability sucks compared to Slack
Android version so often goes offline. While other chat apps work just fine. Web app is so-so... when the desktop app doesn't make sense to install or you can't. Desktop app also is not great.. sending a file causes the UI to just freeze for a while.
Paul Taylor commented
Happens to many in my organization too, specifically with Android. Only solution seems to be to restart the device... Logging out results in no being able to log back in with the message that the device is offline.
The issue also affects Outlook on Android, which is extremely frustrating as the device is fine and other chat / mail / internet dependant apps work. Maybe something to do with the login service??
I also have the issue where the Android app keeps going offline. I have background data restricted but I open the Teams app and it has the notification bar saying it's offline, I would expect after opening the app it would be able to reconnect. I haven't checked (using the desktop app) to see if it actually has connected and the notification is incorrect.