Good luck man. I've had this issue for years with diff video cards. Only happens with one game and only when using Display Port. 99% sure it's been a bug since it's inception. Pretty much all you can do is turn off your monitor, flick the power switch on your monitor if you have one, and then unplug the power cord from the monitor. Give it 30 seconds and hook it back up and turn it on. I've found 3 possible fixes online, but none of em worked. Only work around is what I already stated. Best of luck.