[GAMEPLAY] Swain's Ultimate still damages fizz while fizz is mid Trickster (should be untargetable)

The bug occurred toward the last 5 - 10 minutes of the game, Swain's crows still damaged fizz while he is mid trickster (on the pole). If you can view a reply of the game.

I expected that since fizz becomes untargetable, the crows should not damage him but that was not the case.