Whenever I play chess at the lobby some parts of the screen stay around, like if i get challenged half of the challenge wont be visible because it will still be showing what was there before the challenge. Its like having half a screen on a delay or something if I minimise the window and come back its all normal but then if i do something like move my mouse it will suddenly become screwed up again, anyone else had this? And how can i fix it, it makes chess unplayable.