Fetid Pool enemy stuck inside Crimson Iron Node

Crimson Node in Fetid Pool and zombie spawned in same location making it impervious to any attempts at destroying it. It seemed stuck in one spot inside the central outcrop and seemingly did not know of my presence either as Leaky McLeakynuts didn't even try to attack me.

Things I tried:

Bow / Bow Skill


Melee / Melee Skill


Traps

Obvious workaround is redoing entire area (ctrl-click on instance to force reset).