[Client?] Nemesis Champ Select Unresponsive

I queued for the Nemesis game mode, entered, and was fourth down on my team's list. I was not able to select a champion for the enemy team when it was my and my last teammate's turn to choose. I tired to select multiple champions but none would register. Everything else on the client's screen seemed to be working properly. I was the only one on my team unable to select and was eventually booted from the queued game. I hope this doesn't affect my "no quitting" status for the Nemesis game mode (is there somewhere else I should submit a ticket to better prevent this from happening?).

Thanks.

P.S. Mac client