[Gameplay] WW ulti won't stop

I was looking at a match when Blitz uses his Q and immediatly after WW ults him. The grab finds Warwick that is stunned and the suppression is over, Blitz uses his R silencing him but the animation of WW R are still there and dealing damages. I think after being pulled, stunned and silenced WW R is supposed to stop but in this case it continues. I have a short video of that but i don't know how to upload it here.