Artifact of notification window hides taskbar
Regularly, when logging in after StandBy or after having locked the screen, coming back from a meeting or whatever, there is a remaining artifact window visible on the lower right part of the screen that hides the respective portion of the Taskbar (especially the clock which is really annoying).
Sometimes the window is white, sometimes its black.
Spyxx shows this window to have a caption of "Microsoft Teams Notification" and a class of "ChromeWidgetWin1". So it is clearly part of the Electron based desktop application.
The window is always empty and most of the time there actually has been no activity that I should have been notified about.
The window cannot be closed except by exiting Teams and restarting it.
I attached Screenshots showing the window and the result of Spyxx.