Azir's Ult is Seriously Bugged (Details inside)

Okay, so I was playing a game as Azir mid... My match information is here: CLICK ME! .

Anyway, I wasn't recording the game so I don't have any visual documentation of this, but all of the players in this round saw it and we talked about it during the match. This bug did NOT result in my loss, but I'm still upset about it and I think it needs to be fixed ASAP.... So here's what happened...

When Azir ults into an enemy champion, it is supposed to knock back that champion, do some damage, and block their movement....

What actually happened when I ulted into a champion, is the ult performed the animation and did absolutely nothing. The ult passed through the enemy champion, did no damage, and didn't block the movement of the enemy champion. It was really upsetting and caused my death on several occasions. The ult did work twice during the match... but the rest of them did not work. I tried it on every one of the enemy teammates and it didn't work on anybody but Diana ...

Riot, please look into this and fix it. I will not play azir until this gets fixed.