Bug in ARAM lobby

I was just in a ARAM lobby and at the beginning, before the game even started it said in the chat "Player x has left the channel." Meaning they left the lobby/game in general, however, with 10-15 seconds left until the game started it continued to count down and not kick us from the lobby so my team went in at 4v5 from the start when it should've kicked us.

Please fix this Riot. :/