Cast When Damage Taken support affecting linked Skill Gems that are too high level

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What is the behaviour in-game?

The Cast When Damage Taken support gem, depending on it's level, only affects linked skill gems that are below a certain required-level threshold.

What is the behaviour in Path of Building?

The Cast When Damage Taken support gem affects all linked skill gems regardless of required level.

How to reproduce the issue

Starting with a new build:

1. Switch to the Skills tab
2. Add a new Socket Group
3. Add any damaging skill gem (e.g Arc) and ensure it is set to level 20
4. Note the reported Damage and Mana Cost for that skill
   
5. Add the Cast When Damage Taken support gem to the group and ensure it is set to level 1
6. Observe that Cast When Damage Taken is affecting the reported Damage and Mana Cost for the chosen skill in step 3
   

Cast When Damage Taken should not apply to the skill in this instance, because level 20 Arc requires a character level of 70, and level 1 Cast When Damage Taken can only support skill gems requiring level 38 or lower.

Character build code

Simple Reproduction: https://pobb.in/8pUPSX500oY1

Build with incorrect warning caused by bug: https://pobb.in/qQ5Zcu2jB7EZ
Note this build has a CWDT-Hextouch socket group -- PoB reports 1 Warning that there is not enough unreserved mana to cast Despair, but this is because the 250% cost multiplier from CWDT is being applied to Despair even though its gem level is too high (see screenshots).

Screenshots

CWDT-Hextouch socket group:

CWDT mana cost multiplier affecting Despair:

Skills タブで、レベル 1 の Cast When Damage Taken ジェムをレベル 20 の Arc にリンクして問題を再現し、その後サポートを外した場合に表示されるダメージとマナコストを比較します。リンクされた CWDT-Hextouch ビルドと、そのマナ警告も確認します。完了条件は、レベルが高すぎるリンク済みスキルが Cast When Damage Taken の影響を受けなくなることです。