Whenever i play on the map frontier, whether im in an AI skirmish or online game, my screen always goes black after a couple minutes, my monitor displays the input setting (HDMI 1, DVI, etc) and then the screen stays black but i still can hear sound and even select units or buildings and do stuff, i just cant see what im doing. Then it either crashes after a few minutes or just stays like that until i force quit the game. I have tried reinstalling the game and i have made sure all of my software is up to date. This only happens on the map frontier and whenever i try to play the 5th mission in awakening the nightmare. It happens 100% of the time when i do either of these. Any suggestions on how to fix this?