Sun and skin textures swap after unapplying old resource packs

Just... watch the videos. Using outdated resource packs leads to weird results EVEN WHEN THE PACKS ARE TAKEN OFF.

I applied an outdated pack in the nether (so I didn't notice the sun) in one world, then quit and made a new one, then the videos happened. I think the sun and skin textures swapped, but were still weird EVEN WHEN THE PACKS WERE TAKEN OFF.

https://youtu.be/ByOiCooFNoU

https://youtu.be/7U5seRl2Ch0