[1.1.1] Win 10 - Arachnalisk Mastery doesn't interact with persistent poison

Master of Arachnalisk’s wording gives the impression that neither the source nor timing of the debuff’s affliction should impact it, unlike smogs. However, any number of arachnalisks from swapping and stacking does not result in a change in poison damage from Friden’s trait The Black.

edit:
with the same afflicting stat and 13 arachnalisks this is the difference between using Carcinogen (The Black is functionally identical) and manually applying poison. I’m uncertain of the intended behavior, but I feel that it would be less potentially misleading for Toxicologist&other applications if this trait could get the “When your creatures afflict enemies” type of description if this interaction is currently working correctly.