Vladimir W doesn't work with Nasus Q

Once the animation has started for Nasus Q no ability can make him stop, so if you use Vlad W after nasus has started the Q animation it will still hit, this is the same for Caits headshot and Jayce first hit after entering hammer stance, and I believe a couple other abilities. I dont believe this is a bug.

vlad is buggy and riot doesnt care; deal with it.