A bug with Yasuo's W

So I was playing against Yasuo as Ziggs (I know, it sucked, but not my point) and and a certain moment he used his windwall to block my E , but as it came up and blocked my E , Yasuo used his E to get ahead of the wall, I tried using my Q and W to hit him, but then windwall blocked both of them, though he was clearly in font of his wall. It happened a couple more time during the game, and it was kinda annoying.