[CRASH] Client froze on Poppy respawning in ARAM

Playing Poppy in ARAM. Died, the instant I respawn, client completely stopped. Frozen program, "not responding" according to Windows. Exited all League applications, restarted League (twice), each time able to log in, getting the screen to load that's always in the background that says "Game is in progress..." but nothing else ever loads or even tries to load, no game, no loading screen, no other window at all.

Restart computer and my game was already finished, although as I loaded the client (before I entered my password, I believe, but maybe after...) it said something like "We have restored this client to an older version of League of Legends. We will now try to update", but then just logged in normally, but my game was already over.

Using Win7, nothing unusual, nothing changed recently, haven't encountered any other problems with League since I reinstalled it a month back.

Going to play more ARAM games, if it happens again, I'll mention it. Either way, there's some bug, and I think the "We have restored this client" message may say something...

Also, it really pisses me off that you guys have such a condescending message for the first time anyone ever "Leaves" a game. I don't leave games, and I definitely don't need a computer program condescending me. I'm more concerned about you fixing that stupid Leaverbuster message.... just because it may not piss you off... I honestly find this seriously insulting.