Skin pack not working

I've created a skin pack to keep my skin because I don't want to put it as "custom skin". It worked fine until 1.13.0.9 came out, where the skin pack showed up in game, but it was blank. See image.

However, this same skin pack (not the one attached below) WORKS in 1.14.0.3. Mojang, please resolve this ticket as "Fixed" with fix version/s 1.14.0.3 Beta.