Following are few issues in teams which you must consider in your future updates:
1. Teams application doesn’t actually run in background even though “On close, keep the application running” in settings is ON, because when you close the application it takes again long time to open vis-à-vis minimizing the application.
2. Reduce the time taken to open the MS Teams application (currently takes approx. 7 seconds each and every time to open application).
3. There is no option to delete a chat, only option to hide; This is something weird.
4. All the above same goes for android application as well.
5. Application takes all the space from screen, in Skype it was much better.