@Riot: Left ARAM Pre-Game Lobby Before Lobby Ended And Got Leaver Buster

I didn't get punished. This isn't a rage post because of that. I just had to type "I Agree" to not leave another game. The thing is, I left before the countdown to pick your champion reached 0 seconds. Yet the game still went on without me and I got my one freebee to leave a game used up because of the client. Has anyone else had this happen before?