When you teleport onto the blobs formed from Zac's passive after death, the blobs become invincible and he spawns as soon as the teleport finishes with no chance to kill the blob.
Is this a bug or working as intended?
Working as intended. The bloblets are coded as minions, and thus are made invulnerable when being used as a teleport target. This adds some strategic usage into TP. Do you use TP to try and save Zac and possibly turn a fight? or let him die and save TP for another time?
As said before, Zac's blobs are coded as minions, which is why you can teleport to them in the first place. It's also why you can use Smite and Nunu's Consume on the blobs as well.
That's been there since Zac was released.....
