Vixen's Curse overlaps doesn't change damage past two with Awakened Spell Cascade

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What is the behaviour in-game?

When using Awakened Spell Cascade, PoB shows that 3 overlaps has no damage increase. However, testing in-game, I can tell my damage is significantly faster and higher than using normal Spell Cascade with just 2 overlaps.

What is the behaviour in Path of Building?

When trying to set overlaps to 3, the damage does not change at all. The damage remains the same at 2 overlaps.

How to reproduce the issue

Use my PoB link.
I did some testing and adding a custom field of 11% reduced Cooldown Recovery Rate seems to allow the third overlap, but my damage is the same as two overlaps.

I am not quite sure what is going on, but it seems the overlaps are hardcapped with a certain CDR? From various guides, and data on the internet on the build nobody has mentioned this being a thing. Not sure if it's a bug or if some other behavior is being applied behind the scenes.

Character build code

https://pobb.in/ndK__IKZoz6k

Screenshots

2 overlaps:

3 overlaps:

Commencez par charger le build PoB lié et reproduire Vixen's Curse avec Spell Cascade normal et Awakened Spell Cascade à deux et trois chevauchements. Comparez les dégâts obtenus et le comportement du cooldown, y compris le cas personnalisé signalé avec 11 % de Cooldown Recovery Rate en moins. Le travail est considéré comme terminé lorsque Path of Building reflète correctement les dégâts du troisième chevauchement en jeu.