Vile Vultures animation while spawning on bridges (Spires)

EDIT: My apologies, I should have posted this in the bug reports thread. DOH


Is it just me, or does it feel like whenever Vile Vultures spawn into the game, especially on bridges (Spires)... They: appear to spawn/jump into map, land onto the ground, then pop smoke and disappear... Only to reappear again in a leap attack (regardless if they are frozen or not)? for a split second, they go invisible at the beginning of this animation.

EDIT: video link https://youtu.be/LXtNFLcWigo around the :27 to :28 second mark, a vile vulture appears to disappear shortly after spawn on bridge, then reappears into a leap attack. I don't know if this is normal. I don't recall them disappearing on the ground.

I have recognized their patterns, but it just seems buggy to me. I don't recall them doing that on regular terrain (I will check into it time I run across them on regular ground).

thanks.