regarding Mephisto B&P, the computer flags the game when opponent's expected thinking time gets exhausted, starting with level 3 (5mn/60moves, so 5mn flag...). The computer displays "TIME" and would not accept any additional move input, unless 'CL(ear)' key is hit to continue.

The plugin (apart from any recent fix, if any) does not handle this situation (would need sort of a 'clear announcement') and sends the opponent's move which is displayed on the SBoard but not aknowledged by the B&P computer, stuck on the 'TIME' display.