Bino's Kitchen Knife Not Working on Harbinger Monsters

I am writing to report a bug related to poison proliferation on monsters spawned by Harbingers.

Currently, I am using the Viper Strike of Mamba with the Pathfinder Ascendancy, and I am wielding Bino's Kitchen Knife. I intended to focus on Harbinger content as my primary mapping content with this build. However, I have encountered an issue where poison does not seem to proliferate on monsters summoned by Harbingers.

It appears that both Bino's Kitchen Knife and the Master Toxicist passive of the Pathfinder are not functioning correctly in this content.

hello
i think viper of mamba is bugged with prolif.
i have same issue, i've been testing it and paying close attention.
prolif is not always working, most of time not working.

i dont have bino.
and is not only for harbi.

can confirm, seem to be having big issues with harbinger

Playing on Trickster w/ viper strike of the mamba and bino's appears to have the same problem described here

Same for me. Playing a Trickster with mamba and 2 bino's and the prolif is very very unreliable to the point that I get stuck in the mobs. Also not focused on Harbinger for me.

And yes I have 100% crit and hit chance.

Running Harbingers and was wondering why nothing prolifs. Its aggravating that this is a bug.

I'm also using VS of the Mamba - Trickster with Bino's dagger. It is also inconsistent to proliferate. Sometimes it goes far and sometimes a tight pack won't prolif from the poisoned mob. Then I poison another in the same pack and it will prolif. Very inconsistent.

Also, yes, Harbinger mobs don't even prolif at all. Completely undoable.

I can confirm this also. Binos Prolife is very inconstant I am way over crit capped and sometimes it just doesn't work.

I am having the same bug with Viper Mamba. The prolif works fine with cobra lash

Iam having the same issue. Hoping for a quick fix.