When i wear more than one 3D item, only one of the models appears in the world. This is also true for dual model items like wings, only one wing will render correctly if i only wear wings. It only does this in the world and not in the GUI. Images are attached. It happens for players and for mannequins.

To Reproduce
Steps to reproduce the behavior:

1. hit P
2. put any two 3D models on
3. exit the GUI

Expected behavior
i expected to see the items rendered on my player character.

Screenshots
https://imgur.com/a/nDl8tkq

Debug crash log
https://pastebin.com/C0sy3DWk

Sorry, 1.7/1.12 is no longer supported

i ask because 1.12 is the latest version on the readme file

how do i check which versions are supported?

is there at least a version on curseforge that worked at the time on 1.12 or are all of them broken? should i just test every 1.12 file on curseforge if i want to use an old version?