Extra geometry skins exploit in the latest version 1.6.0.14

this should be a feature rather than a bug, mob skin packs should be on the market place since everyone wants it.

This should be fixed in the 1.7.0 update - if you are still experiencing the issue please comment below.

I found out that long ago (and even as soon as this exploit gets patched) players found a way to be able to do such by using theirs to replace official versions of skin-packs downloaded by the game, it's unfixable unless you implemented a way to auto-correct corrupted Marketplace content or switch up their UUIDs. And the root reason players were doing that is because they have to workaround the "patch" of this exploit, in fact, Marketplace Panthers are currently only those who have official ability to create skins with custom model (custom / extra geometries, 4D skins or whatever you said that means one in common sense) (Marketplace content includes Minions, Sonic, Mega-Man, etc and content ported from Console Edition includes Super Mario Mash-up Pack, LittleBigPlanet Mash-up Pack and Festive 2016) but we can't, you can say it's because the patch is due to it not being an official feature (see bolded paragraphs, such irony) and to prevent malicious creators from creating models that can camouflage, but how about game developers adding a default-on toggle for "Only Allow Trusted Custom Model Skins" that can be turned-off so players opposing that can kept that on and those who like such can turn that off, or if players enabled "Only Allow Trusted Skins". I've upvoted the feedback https://feedback.minecraft.net/hc/en-us/community/posts/360011255291-Custom-Player-3D-Model-for-Java-Bedrock-Edition for community's guidelines to skins with custom / extra geometry (custom models), hopefully this will be officially implemented soon