Ever since updating to Big Sur and Parallels 16 (using 16.1.3) Windows opens to a black screen. I have it set to open to full screen. I have tried resetting the VM many times. The only solution I've found is to exit full screen mode, enter Coherence, at this point I can see the Windows applications. I then exit Coherence and go back to full screen and everything works until the next I open Parallels.