paid skins do not show when there is an add-on/DLC/texture packs on the world/server

recently i bought that optimus prime outfit for the custom skins in the marketplace. UNFORTUNETLY, when i was about to play with my friends on an Custom Realm. MY SKIN DIDN´T SHOW UP, i re-started the game thinking it was just a minor big BUT IT KEPT DISAPPEARING! then i went to the public server list and by some reason the skin actually showed up there. but not in my friends realm. guess my surprise when i created a new world and put the Star Wars texture pack AND MY SKIN DIDN´T SHOW UP AGAIN