So in the gif above it shoves you how Yasuo blocked my feathers from Q and a auto attack so they droped infront of it and when i used my E to root him since he had gone past the wall the feathers got deleted by the same wall even when they were infront of it.
Notice how his wall slowly moves forwards after being cast.
I see them behind the ground line.
It is possible that he used Wind Wall in the exact moment they had hit him and the wall then moved on.
It's because the wall stops the feathers directly on the wall, and the feathers have a hitbox slightly behind the feathers, so the hitbox hit the wall and disappeared. Also, the wall does move the entire time it's up
