I'm using version 1.12.2 and at first I could see the backpack on my player, but now I've noticed I no longer can. The backpack still works, but i cannot see it on my player model

Still persists?

Do you know how to reproduce this issue? Are you using any modpack?

I have this issue, too (also in 1.12.2). It persists after uninstalling all other mods.

I'm having this issue too. Could be the typical rendering issues with Optifine (I'm using OptiFine_1.12.2_HD_U_E3), but I'm not sure.

I have a random assortment of mods in my test pack and have removed some with no effect visually. So far, from what I've tested, everything else about the mod works as intended.

The only other thing I can think of is possibly the Forge version, which is Forge 14.23.5.2834 for me.

Edit:
After starting up my world again, the visualization of the mod seems to be working now. Not sure why it wasn't showing up before, but now it's working. So....I don't know then, lol.

I'am having a similar problem, the texture of the backpack is invisible, but on my player or the floor it works perfect, and the texture is visible, any solution?