Gamebreaking Draft bug

when i enter a draft game (usually for ranked) i ofc. have to ban a champion (or lock) when it's my turn to ban, but when i pick the champion that i want to ban the ban champion icon just goes black and i can't ban the champion even though i select other champions. this bug has punished me for playing the game (or almost playing the game, since i get kicked out of the lobby for not banning a champion or not locking a champion). please fix this fast since i can't play the game right now because of this. i don't have a photo of the bug yet but i will get one soon.