[GAMEPLAY] Dunkmaster Darius Bug

So i just bought the Dunkmaster Darius skin after playing Darius for a couple months now. The first game I played with him was a ranked game and I immediately started having problems. Whenever I was in combat and I would get knocked up/knocked back (I was laning against Sion), I would lose the ability to right click target anything. I eventually figured out to Restore Defaults in the menu whenever this happened and it would be fine for a while. I lost my lane horribly and the game was lost and I felt terrible for feeding my lane. I then played a custom game with the new skin against a bot Cho, and the same thing happened. It would only happen in combat and it might be any ability cast on me but it seemed to be mostly the knockup that took away my ability to right click target. I then figured out I can left click and that would restore my right click targeting.