Chimera MTX + Phasing effects

Was the Chimera armor set MTX special effect "Red Phasing" removed? I know there are phasing graphic difference depending on the source of the Phasing buff, but i cant seem to get the alt color to activate. I've tried activating the Phasing buff from the Raider ascendancy and from Abyss Jewel "% on-kill" Am I forgetting a special requirement or restriction? Thanks for any help!