Super armor doesnt work in pvp

So i decided to play some PvP with my Scrapper and i noticed when i use my ability called Chain-Destroyingfist or something like that i dont have superarmor, but when i read the abilities description it says:"Superarmor: Stun immunity

anybody else having this problem with maybe any other char that your superarmor just doesnt work? or am i just dumb and do i not have super armor tho it says i have superarmor? xD

I would appreciate help/fix :slight_smile: