[Client] Client Goes Completely Black After Minimizing

It happens only in dynamic q champ select. I minimize my Client window, while watching youtube videos on Chrome, and when it's my turn to ban, or select a champ, the Client window pops up completely black. I can still hear the sound, and i can still click on things, I just can't see any of it.

1.) Go into a ranked champion select. 2.) Minimize the window by clicking on the client in the taskbar 3.) Wait for your turn to pick, or ban a champion.

Occasionally it will pop up as black and I will have to dodge.