I'm just wondering if Jungle Fortitude for Witch Doctor is working as intended.

It states that it reduces damage by 20%, but this isn't reflected anywhere in the details screen when I apply or remove it.

Is it an independent modifier on its own (which is why it doesn't show in damage reduction) or is the game just bugged to not show this detail?

*note: i can't tell if it works by playing because it kinda feels the same to me.