Galio Abilities & Yasuo's Windwall

Hey team. Was just in a game as Galio v Yasuo, and Yasuo's Windwall (W) was blocking my Resolute Smite (Q) & Righteous Gust (E) despite facing the wrong direction. This doesn't seem to match the way Yas' Windwall is meant to work (that is, only projectiles from the 'front' of the wall), but I have no idea if that's intentional or not.

Unfortunately, I have no way to record any testing, but a friend and I did go in to a custom match to make sure I wasn't just imagining things and yeah. It's happening. Easily repeatable.