Decaying Hex Support doesnt combine with other support gems

Despair is spell skill that with the decaying hex support inflicts non-ailment chaos DoT debuff. Only after supporting despair with decaying hex the following gems show that they support despair but dont boost the damage at all (tested at the colossus boss)
-Swift affliction
-Intense Agony
-Drain Ailments
-Derange

Also Decay doesnt apply with:
-blasphemy
-Hex bloom







Bug Report ID: #443672390

Same issue with me.
https://www.pathofexile.com/forum/view-thread/3754392

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ernesthy#8834 が発言:

Same issue with me.
https://www.pathofexile.com/forum/view-thread/3754392

Also the same with Hex Bloom, proliferated curses dont trigger decay.

#bump