Redstone specialist skin packs not working

This bug has been bugging me for two weeks so i finally decided enough was enough and its time to fix it. Basically, when you open up the Redstone specialist skin pack, the previews dont work. It would seem as a minor glitch to most people, but when you join/make a world, your skin becomes steve or alex. People pay money for this so it makes new players skeptical. Extra info: On pocket edition, preview works but the skin is disfigured and messed up.