[GAMEPLAY] Yasuo windwall doesnt block annie q

(annie in wonderland and project yasuo skin) In howling abyss I kept trying to Windwall annie's q. It wouldnt block it. At first i thought i misplaced the wall but throughout the game i saw it was clearly going through. Once i upgraded windwall to level 2 the problem went away.

1. Windwall w/ yasuo
2. annie q (with stun up)
3. get stunned

I only experienced this in one game so might have been a weird error, but none the less, if its a re-occurring problem then I hope this helps.