It appears in certain circumstances, when you alt-tab out of the game, when you come back you just have a black screen with the music playing in the background.
My game is set to Fullscreen, 1080p, which is the same res as my desktop.
I’ve been able to reproduce it if I do it while the Victory or Defeat screen is up. If it takes too long for the end game stats to load, I alt-tab out and when I come back, the screen is black. I’m guessing something about the way it refreshes the screen in order to create the stats.
I’m using a GTX 770.