[Mac Client] Cannot select a champ

Hi, I've tried today to launch ranked, I can accept the game but in champ select, I can just declare my champ, ban, but never pick. In fact, the screen freezes after first player pick and I never see the select champ button. So I already got 30min cool down delay to queue thanks to this bug... it's pretty annoying. When it freezes, after the delay to pick, people in the room are disconnected but not me, I'm still in the room and can do nothing. Meanwhile, I'm returned in the queue but since I don't see the queue screen I cannot accept next game and I'm automatically dequeued. I'm not sure if the problem comes from my client or not but it is gamebreaking. Cannot launch a single ranked.