Reviving enemies turning invisible

This might have already been reported as lot's of people post about the occassional invisible enemies but I did not see anyone talking about the exact issue I'm facing.

It seems that destroying the body (shattering, lightning warp, etc) of any mob that has some kind of revive turns them invisible if they do end up not dead just yet.

This is especially annoying on rare enemies with the reviving minion mod but is easiest replicated in the fight with the Vessel of Kulemak.
Destroying his body in any shape or form makes him invisibile for every stage/revive after.



It's probably not that big of a deal but get's quite annoying when it does happen.
I had quite a few occasions where invisible minions keep respawning on top of me because they somehow died across the map, now endlessly following me around until I find the rare mob with the modifier.