client bug: error selecting your champion

i was in a lobby and we were banning champions and i banned ezreal, but when i banned him his icon showed up in my pick intent while he was banned at the same time. I wasnt able to lock in my champion because the ezreal icon was on my pick intent and whenever i tried to lock in a different champion i kept getting "error selecting your champion" and since i couldnt choose anything i was forced to dodge.