So this is a minor visual bug on the beta versions that affects the 'slim' style of the skin... however it is still fairly annoying since a player skin should match the design that is intended. the first two screenprints are the one in the current release (1.14.60 hotfix) which show how the skin should be displayed... and then the next two screenprints show the beta one with a red outline showing the ''corrupt'' or not loading parts. As I said this particular bug only appears to be affecting the slim model.