Is agressive resistance broken or just not showing correctly?

So rank 1 of something will say is 2% dmg resist or w/e, rank 4%, 3 6%, etc, but agressive resistance for the barb, shows rank 1 is 4% and rank 3 is still 4%, is this broken ? not showing correctly? or is it not worth putting more than 1 point into it?

Been that way since day 1. Given zero priority by Blizzard.

had only noticed it today when i got a ugly bastard helm and it stayed at 4%

It’s d4 you can pretty much bank on it being broken lol

Tooltip line mismatch. Check your total flat DR line before and after you hit War Cry for berserk to see the difference.

Tried that and with the helm on (5 points) and no points into it extra,
it shows all reduction 24.8%,
helm +1 point is 28.5%,
helm + 3 points is 36.1%, so it must work, but just not show it.

I remember it being like that early on when I was leveling. Blizzard fixed a bunch of bugs in a patch but have ignored it.