The client seemed to freeze after the champion select countdown ended, a little while later the game seemed to start normal. However it turns out League launched two separate games with the same 10 people in each one.
Spaghetti code strikes again (League of Legends)
The client seemed to freeze after the champion select countdown ended, a little while later the game seemed to start normal. However it turns out League launched two separate games with the same 10 people in each one.