While in the Helm, the "Vest of the Taken King" (Ghosts of the Deep hunter chest piece) is not visible. Tested with both the ornament and the actual piece of armor. One friend on PC was able to see that my chest piece was missing, the other on Xbox was able to see the armor in place as it should have been. Was not able to test any of the other class specific chest pieces. All other armor from the set seems to be working fine for the hunter. Doesn't appear to be caused by a specific shader