Champion Select stuck in ranked

In champion select (ranked). Everyone chooses what champion theyre going to play. Im 3rd in group, so i get to ban first, but the whole banning process doesnt start. Everything just stands still for a whole minute, then in chat it says the rest of the group left the room. 10 sec later the game just stops and says i didnt pick anything to ban and get a loss for the game. Was in promo, so that hit me pretty hard. Had no internet problems at all.