This seems to be a common occurence for me with my version of this game.
I have the version availabe through Steam. This has happened 9 out of the 10 times I have played COLE now w/ a fixed 30 minutes per game time control.
Maybe 10-15 minutes into the game I will make a move, and the time control will FAIL to switch over back to the CPU Cole and will stay on me. I can then move Coles piece and the game accepts it as a valid move but the time control remains on me. I move a piece, again time control fails to switch.
Anyone else have this issue?