Riot please fix the leaver buster system

So earlier today i was playing a ranked game which of course i lost. Just a suggestion there should be an IQ test before one can sign up for League. However back to my game, i was present and playing for the entire duration of the match and after pressing continue to go to see the stats of the game i was told my account has been suspended by the leaver buster system for afk. I have no clue as to why i have been banned, riot please fix this.