When I load my game, at least 90% of the time it can't load any of my skins in my collection. In the 10% of the time my game actually loads skins, when I try to craft any item with a skin, such as a Reavershark pickaxe, it defaults to the generic pickaxe. I've verified the integrity of my game files and the issue still persists.
Try to look at the Item Collection on the main menu. Try to craft items in a world as their skinned variant. I don't know if everyone else is having this issue.