External skin pack not saving

for a while ive had issues with skins installed from an external skin pack (mcpack in /skin_packs/ folder reverting to steve skin when entering the marketplace or restarting the game  Any skins revert when skins are present in this folder.

https://anonymousfiles.io/Kzuf2JGB/  Here is a link to the skin pack im using.  Its of my own creation

 

Ive seen wierdness with marketplace skin packs and resource packs   as well as REALLY slow loading.