Torghast Vengeance issue

[Shadowbourne-bronze-dragonflight]

Hello,

I am not sure if this is the proper place to post this. However i want too adress this.

In the last couple of days ive tried Torghast several times. One of the traits you can aquire is called “Shield of Unending Fury” This trait gives you the immunity while casting Fel devastation.

Here comes my issue and question. When casting this as a Vengeance demon hunter you loose all threat on all NPC that you currently have aggro on.
I know immunity’s usually lower threat like what paladins have but this is a trait that comes as a bonus.
My question is this intended or a mistake?

Sincerly,

Shadowbourne

[Smokeysis-bronze-dragonflight]

Its intended i think its is rlly frustrating tho

[Felini-thrall]

This power is something you may want to take solo as mobs will go for your party if used there.