Runegraft of Treachery fails to grant Elemental Ailment Immunity from Purity of Elements to enemies

[yama-noki]

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What platform are you running Path of Building on?

Windows

What is the value from the calculation in-game?

In-game, when Runegraft of Treachery is allocated and Purity of Elements is enabled, enemies are immune to Shock and Chill, among other elemental ailments. They are unaffected by Summon Skitterbots' Chill and Shock auras.

Since enemies are immune to Shock and Chill, they do not take the associated increased damage from Shock, and they also do not deal less damage caused by Elementalist's Shaper of Winters.

What is the value from the calculation in Path of Building?

In PoB, when Runegraft of Treachery is allocated and Purity of Elements is enabled, damage calculations include the increased damage taken effect of Shock, if Shock is enabled in Configuration or force-enabled by Summon Skitterbots.

Damage taken calculations also incorrectly reduce enemy damage taken by Chill effect if Elementalist's Shaper of Winters, if Chill is enabled in Configuration or force-enabled by Summon Skitterbots.

Notably, POB does correctly calculate the added elemental resistance gained from Purity of Elements, so it is correctly assigning the resistance. It simply doesn't assign the elemental ailment immunity.

How to reproduce the issue

1. (Optional, for checking Shaper of Winter interaction) Change Class to Witch and Elementalist and allocate Shaper of Winter
2. Select any damaging skill as main skill
3. Allocate Runegraft of Treachery on the Tree
4. Add Purity of Elements to the skill grouping
5. Add Summon Skitterbots to the skill grouping
6. Observe in Calcs tab, under Elemental Damage dealt, that both the elemental resistance from Purity of Elements and the increased damage taken from Shock are being included in the calculation, even though the enemy should be immune to Shock
7. If Shaper of Winter is allocated, observe that Calcs for Damage Taken is being reduced due to Chill effect.

PoB for PoE1 build code

https://pobb.in/njWqGvPp2qnH

Screenshots