Game crash after game starts up!

Everytime i start up a game, there is a 50-50 chance the game will crash, forcing me to reconnect from client. This occurs after about 30 seconds of the match starting up. Once i reconnect though, it seems to work perfectly normally afterwards. May be the cause of alt-tabbing in the loading screen, as i will do that if i want to search up some music or MOBAFire Matchups for my champion.

Thanks again!