[CHAMPIONSELECT][BANNING][RANKED GAME]Problem with banning champion

Today i had a problem about starting ranked game. It was something like this:

1. Find ranked game
2. Highlight preffered champion
3. "Banning time" - i choose one champion, another, another, another... "Ban button" was disabled
4. 1-2 min later we had a little conversation on championselect chat
5. Championselect threw us out
6. 2-3 minutes penalty for running away from the game

Problem wasn't repeat itself for me, but maybe it is worth to notice it anyway.

Server was EUW