Yasuo Windwall

while playing a game as ahri against yasuo , I encountered what i thought was a bug. on rewatching the replay you can clearly see that ahri's hitbox was clearly infront of the windwall her Q orb just goes out but instantly disapears even tho the windwall is clearly behind her. have attached a link to the youtube highllight of the incident.

R.I.P placements. on a side note. yas is a bs champ.