Chance to Poison from tree not applying

Problem: Appears as if the +% Chance to Poison with Attacks from Skill Tree are not applying.

Situation: Using Viper Strike of the Mamba, the chance to poison remains at the base of 60% even with tree passives leading to Fatal Toxins, Toxic Strikes and Swift Venoms. When using a "Chance to Poison" support gem the tooltip correctly updates to "Always Poisons" as it applies its 40% chance to poison correctly.

https://pobb.in/6wxvNAOLrC60

This PoB shows what should be 100% chance to poison, but the tooltip in game (and behavior in game) both act as if the base 60% chance to poison is all that applies.

Attempted:
Fully reset passive tree
Log out, log in.
Unequip and reequip all gear / gems

Edit: Appears that Herald of Agony also does not apply its "Chance to Poison" correctly.

Edit 2: Feel free to close, phys damage was killing before poison could apply, the character sheet properly shows the increased chance to poison.

TL;DR: Close topic, but I'm leaving this up here as a monument to serendipity.