[GAMEPLAY] Azir collision glitch

So I was playing Azir in ranked some number of hours ago and I was getting ganked by a hecarim and a katarina. I tried to W,E,Q (in that order) over the wall, but hecarim's charge seemed to make my character spazz for a second, then pull me back to river. Luckily I had my ult to save myself.

I watched this replay a few times, and it seems to change between two different scenarios. At one point it will make it over the wall, then immediately pull my azir backwards before a knockup (which is what I saw on screen during the match). The other scenario that seems to happen is that Azir doesn't appear to make it over the wall at all, shoot along the wall for about 1 to 2 frames, and then get knocked up.

I don't know how to replicate it and I haven't tried to myself in a custom game or anything, but I'm sure it's just a hitbox issue or something along those lines. The opponents seemed to notice it too; they stopped to chat in game (though I don't yet record live because it slows my computer down).