Rendering bug with Fade on the Barbarian

Is it normal to not render the Arreat’s Face helm on the Barbarian after Fade triggers?
Just noticed that on the Frenzy char of the PTR.
It gets so transparent (the helm model) that it shows all of the barbarian’s bald head… I sometimes even thought that I wasn’t wearing anything due to lack of strength, but then realized it was there. o_O weird