Kaboom

So whenever i am in game i hit esc sometimes on accident instead of hitting f1 for the hotkey anyways when i do so it black screens and i cant get back into the game this is really annoying idk how many games i had to quit and quit on my allys because of this annoying bug it didn't do this before this new client came out.. need help with this asap thanks

It was fine for a few days and now its doing it again.

Me and my brother are experiencing the same problem i have windows 7 he has windows 10.. it started doing this today worked last night ok