Black screen when changing channels

Hi guys,

i notice that i have a roughly 30% chance of getting the black screen when i change channels. The sound in the background is still ongoing though. If i press alt+enter to shift into window mode, it just shows a black screen in windowed mode. Switching back to full screen will still result in a black screen. Only option is to force close and restart the game. Any reasons as to what could cause it? Thanks