Edit: I realized my json was wrong it actually works

Edit 2: It actually doesn't work

When specifying the textures for custom blocks. If the blocks.json file uses the "sides" object for the textures, it will then render the default "update" texture for the custom blocks.

If you have other blocks that don't use the "sides" object in the json, they will render correctly.

Reproduce:

in blocks.json make a texture identifier "sides" and go in to the game. You'll see that the default "update" texture replaces custom textures.