Kennen Ult bug

In a game I just played against a kennen (they were using blood moon skin) whenever the kennen would ult you could hear the ult animation but there was no visual whatsoever. My whole team was experiencing the issue and it happened everytime he would ult. Here is a link to it occurring, ignore my annoying mic noise and crappy score :D http://plays.tv/video/56ddd2e04e1c87127d