Ascension bug gave me a penalty.

I had queued up for a game of Ascension and when everyone got in the lobby and started to ban an error has occured, than everyone had left the queue and my client was frozen so I had restarted league and now it gave me a abandon penalty. The bug that popped up said "unknown bug" and now I have to wait for my penalty to finish. I do not know what happened and this is the most information I can give. I had shown a screenshot of the penalty as I was writing this down.