Game refuses to launch after champ select

I now have AFK loot behaviors because the game refuses to launch after champ select. If you restart the client it doesn't work, when you reopen the client it shows that you are in game but no window for it.

I found out you have to COMPLETELY RESTART your computer and THEN restart the client to be able to launch the game. And by that point 3 minutes have come and gone.

It would be nice to not have leaver due to a bug.

Thanks,