Client Crash during loading screen

I just got 5 (20 minute queue bans for being afk remind you that it wasn't my fault) My client crashed right after champ select and I couldn't reconnect till like 5 minutes into the game. Again I don't know why it crashed it never did that before. It was literally an hour long game and I attended early, mid, and end game. Can you guys please take those 20 minute queue bans off and fix the issue.