Kog'Maw passive and Azir Ultimate interaction

I was playing as Kog'Maw in ARAM with the Jurassic Skin (Fun right?) against a team with an Azir.

Things were going splendidly of course since Kog'Maw is amazing and then:

1. Azir used his ultimate pushing me back and killing me.
2. My passive activated and I turned into a yelling screaming dead Kog'Maw
3. I was trapped underneath Azir's soldiers from his ultimate and could not move.
4. Since I was unable to move I blew up NOTHING! (Booo!!)

Basically the bug is that upon Kog'Maw's passive activating I was somehow stuck underneath Azir's Soldiers and rooted there until I blew up.

Just thought I would let you know.

Cheers!