armor does not match the player model at all, just stays stiff

Steps to reproduce the behavior:

1. create a world
2. grab some armor (doesnt matter which)
3. switch to 3rd person

• Minecraft version: 1.12.2
• Mo' Bends version: 1.0.0-beta-2
• Other installed mods: Optifine

i tried every version that isnt crashing my game.

I'm investigating this right now. Although, based on that book item you dropped on the ground, it seems more like a mod conflict rather than an issue with mobends.

This is me speaking subjectively, I am not a developer, just a tester.

Following the steps you posted to reproduce the issue, it seems to be working just fine.
I'm currently using MoBends_1.12.2-1.0.0-beta3-06.08.21, the latest snapshot.
I'm using forge-1.12.2-14.23.5.2855 (It shows up as 2845 in the launcher for some reason.)
I also have JEI installed for debugging purposes.
I also have Modular Powersuits and its dependency, Numina installed, although these should not be required for armor to function correctly.

If you still have your jar file, send it to me, and I'll be happy to test it for you.