[Gameplay] Nami wave going through enemy champ or Shaco bug

I was playing a game where I was Nami and ult'ed the enemy Shaco. In the first instance, he was right in the middle of the wave and didn't get knocked up. The second instance, the Shaco did get knocked up but it was only his clone that the wave hit. The third time, the wave finally did hit. I don't know whether it's a bug regarding Nami's wave or if it's Shaco but the enemy Shaco acknowledged it as well. There was another instance in the match where the Udyr and I were fighting the Shaco and, during the time of the match, it seemed as if Shaco wasn't taking any damage. However, looking back at it now, I couldn't tell whether the Udyr was hitting creeps/canceling autos so I didn't feel that I should include it. video:(http://youtu.be/rm1TL8Mqs4w)