Azir Ult Multiple Knockups
I think this bug has been addressed before, but I just played a game today (Patch 4.21) where I ulted (Emperor's Divide) Ezreal and it knocked him up like 2 or 3 times and I killed him. I think the ult is only supposed to knock enemies up once right? I'm not sure but it might have been an interaction with Ezreal's arcane shift and Emperor's Divide.