"Arc Chains An Additional Time" helmet enchantment is not applied to Arc of Oscillating, but does in game

[bantbattlemage]

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• I'm running the latest version of Path of Building and I've verified this by checking the changelog

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• I've checked that the behaviour is supposed to be supported. If it isn't please open a feature request instead (Red text is a feature request).

What is the behaviour in-game?

By equipping and removing a helmet with the "Arc Chains An Additional Time" enchantment, I have confirmed that in game this enchantment does apply to Arc of Oscillating.

What is the behaviour in Path of Building?

In Path of Building the additional chain is not taken into account in the DPS of the Arc of Oscillating. So far as I can tell Awakened Chain & Chain Support do add DPS as expected from Arc Of Oscillating "15% more damage for each remaining chain".

How to reproduce the issue

1. equip a helment with "Arc Chains An Additional Time" enchant in-game and compare results to Path of Building as described previously

Character build code

https://pobb.in/QjtiS4Kxw16K

Screenshots

[Drox346]

Looks like it's related to this #7126
PoB currently doesn't check against the base gems in many (all?) cases. This causes PoB to differentiate between Arc and Arc of Oscillating as if they were different gems. This is also true for other transfigured gems.