[GAMEPLAY] Client window refuses to take focus until full restart

I've encountered this twice so far, but not sure what causes it.

The game window won't take focus, period. It won't capture my cursor or any key input. I essentially cannot do anything. The only way to exit is through Task Manager. Re-entering the game doesn't fix the issue, I need to restart my system. Both times it happened, it happened after I had immediately re-queued from the previous game, without doing anything in between games.

This is especially problematic, because the game doesn't allow a remake, since I joined the game.