Video Resolution Bug When playing a 2nd game

Dear Riot,

Whenever I play 2 games in a row, the video resolution of my game always goes to the lowest setting and I have to change it every time. The thing is, it only happens on the 2nd game and not in any other game after that. I've played the game on different computers and it happens even when I play on Korean Server too. I'm pretty sure other people have this issue too. Thanks!