At the moment I was making bound parts on the soul armor forge and added sigils on the socket (using demon shards) bound boots and the helmet disappeared after being spawned as an entity.
"/mt hand" & "/protectex itemname" Helmet <AWWayofTime:boundHelmet>.withTag({}) AWWAYOFTIME_BOUNDHELMET Chest Plate <AWWayofTime:boundPlate>.withTag({}) AWWAYOFTIME_BOUNDPLATE Leggings <AWWayofTime:boundLeggings>.withTag({}) AWWAYOFTIME_BOUNDLEGGINGS Boots AWWAYOFTIME_BOUNDBOOTS <AWWayofTime:boundBoots>.withTag({})