Invisible Mundo Cleavers

Like others I have seen post about this issue, I just played a Rageborn who threw completely invisible cleavers the entire game. This completely screwed me over in lane, as it enabled him to hit virtually every one he threw when he wasn't minion blocked (since I had no idea which way to dodge or if he was even aiming at me in the first place). Please take this seriously; it's the same kind of thing as Nidalee and it's gamebreaking to play against.