When connecting to the server, it happens often that the screen stays grey. Refresh button does not help. Closing the connection & reconnecting keeps the grey screen. We have to do this 3 to 4 times in a row to get the actual desktop screen and be able to work with it. This does not happen every time, but often enough to be annoying for users.
Also, the clipboard between client & server does not seem to work. UAC is disabled on the Win2012R2 server.

