Fiddle Ult

While playing an ARAM i was stunned while using Fiddlesticks Crowstorm, instead of it cancelling the animation and cast bar the cast bar and animation continued but once finished acted as if it had actually been cancelled as it should have. This is very misleading in the fact that i did not see I had actually been stunned until i asked and the enemy Syndra also confirmed she knocked me aside yet kept the animation like i was casting Crowstorm. I am not sure if this is a bug or if this is working properly as intended but figured i'd report it in case it is.