{GAMEPLAY}zac E so buggy!

I play zac very often, recently zac's E was extremely buggy. Some times he does not land on where I click. it happens 10% of the time when I use E. This is really annoying because it really ruins team fight and might cause a game. Lemme know if this happen to any of you. And please fix this. also, the E animation is buggy sometime as well. zac running in the air instead of jumping. It happens not as often.