This is on a mac using the Microsoft Remote Desktop App. Ever since the recent update (Version 10.7.8 (2006)), the app has become VERY buggy and problematic. With the RDP window in another desktop/space, the app flashes in the top menu bar when trying to access the primary desktop/space with other apps and returns back to the RDP desktop/space. The only way to resolve the issue is to sign out of the Window server, close the app, and reopen it again. However this is a temporary fix as the issue eventually returns.