Terracota Fanatic ("kamikaze mob") as an Essence, explodes and disappears without dropping loot

Not sure if a bug or intended mechanic, it's kinda funny if it is intended actually; either way, not sure if it is intended behavior for a mob that can "disappear without dropping loot" to be able to spawn as an Essence rare, so I am posting this here anyway.

Broke out on its own when I corrupted it, in case that's relevant.