[CLIENT/GAMEPLAY]? Left a game just in time, but it wanted me to reconnect

If you have seen my previous posts, you will see that I get paired with stupid trolls. When the bug happened, this was one of those times. So first someone autos kallista jg. Then someone literally says "might as well go troll adc bard" and at the last second gets smite. I managed to leave just in time, so I thought. As im logging in, I get the message that says "you have left a game...."

So here I am, trying to avoid a game full of trolls that way I am not "toxic" and some how I still managed to get f*cked over. If I get banned for afk, when I clearly left before the game started, THIS GAME IS NOT WORTH PLAYING!

Don't get me wrong, I enjoy the game, but when it f*cks you over and you had no fault in it, its time to quit the game.
Currently waiting for the results.

EDIT: So I didn't get banned or leaverbuster. This bug needs to be fixed regardless that way it doesn't happen and someone does get banned for leaving a game full of trolls.