[Client] Play button grays itself out for no reason, leaving me unable to queue up.

This is seriously pissing me off. This client has been a god awful experience for me technically, but at this point I can't even play the game. It will just randomly be unclickable for extended random periods and nothing I can do fixes it. I've tried restarting the client every time it happens, but that doesn't help, and I have even tried repairing my installation.