Crash after accepting match (Mostly ARAM)

Every time I start a search, as soon as a match is accepted the laucher crashes. Dosnt always happen but it mostly happens when I play ARAM. I also get punished for leaving the game even though i have no control over whats happening. If the bug isnt fixed there will be no way to play since I will always have to wait 20mins to play. Anyone having the same problem?