Old skin packs refusing to work in multiplayer

My mashup pack skins refuse to function in multiplayer

What I expected to happen
My skins would be able to roam inside multiplayer worlds

What actually happened
The skin pack is disabled to function

Steps to reproduce
Unfortunately, this bug happens on its own, making it impossible to join multiplayer worlds (or even my own) with the chosen skin

Skin packs currently disabled
Halo Mash-up pack
Fallout Mash-up pack

Functioning skin packs
Minecraft Earth skin
Legacy Skin Pack 1
2nd Birthday Skin Pack