Client

I was in Nemesis Draft mode and I was last pick and had a champion picked for me and all went well after I selected my masteries and waited for the game to go through and get into the rift. All of a sudden right before the countdown ends I get kicked from the lobby with three friends saying I didn't select a champion. I really don't want to get penalized for something I had no control over so can I please get an explanation on why I was kicked out? It doesn't make any sense how I could fail selecting a champion after it was picked for me and I picked for someone else.