Flickering to black screen around 20 minute mark

Hi guys, since about a week ago, I've begun experiencing a 'soft crash' in every game I play at around the 20 minute mark. The game continues running, Windows reports a framerate, and I can continue to hear game audio; however, the video flickers intensely for 10-15 seconds before game video cuts out completely. From then on, though I can hear the game running, my game video is totally black, aside from the mouse cursor. It never recovers from this state.

Has anyone else experienced this, or have any idea what might be going on? This exclusively effects FA, all other games and apps work normally on this machine.

We need a log or two to see what is going on. You can find them in the bar menu -> show log folder of the client.

A work of art is never finished, merely abandoned

Thanks Jip, I'll capture the log output next time this happens and report back!