Poro king bug [gameplay][Champion select]

Instead of the game loading after both teams select champions and load outs, the game is exited instead. Not only does that occur, but I have also received a half hour penalty for abandoning games (which is BS considering how I'm trying to complete my missions by playing this game mode, so clearly I'm not leaving these games).

I selected Legend of Poro King game mode, waited for a match, accepted the game, selected my champion (Brand), and my Load out (The burst damage one), then waited. After the timer hit zero, the game was sort of glitching for 2 seconds (like experiencing a minor lag spike) then returned me to the lobby.

I had this same thing happen to me three times, but I stubbornly tried again thinking that I would eventually have a chance to play (instead though, the system automatically punished me for frequent game leaving).

I don't remember what the fourth step for reporting a bug is, but seriously Riot, this is BS. I've been playing this game since 2012, and was just trying to play the featured game like everyone else is.