I have the same issue on my SB, which awakens in tablet mode when the message appears even when connected to the keyboard in confluence mode. Evidence that Windows isn't detecting the connection between the clipboard and the keyboard when this message flashes? And the irony is that when I go on to disconnect the clipboard, it won't autorotate even after toggling rotation lock on and off. Display driver crashed and recovered shortly after on at least one occasion.
Any updates from Microsoft?