So sometimes the game force closes and doesnt show on the task manager or anywhere on the computer to be able to re open the game. I hear the volume from the game but the game disappears from the task bar and doesnt even show on the task manager to force quit… Annoying bug considering im high level in ranked multiplpayer.
Until something can be done about that, you can try switching your video settings to Borderless instead of regular Fullscreen. That completely fixed it for me and, to my surprise, did not introduce any input lag (or not more than 1 frame of it, at 120fps; either way, I couldn’t perceive it if it was there).
I’m having the exact same issue. Seems like anytime I alt-tab to a different window, it triggers it. Hopefully this gets more attention and get’s addressed soon. In the meantime, glad to know there’s the borderless work around at least.
same, Hope this gets fixed next update
Same, bug too 
They really need to fix it up !