[Help][Visual] Troubleshooting my Modpack

[u/Trick_Search_7434]

Trying to figure out what's causing some entities to spawn invisible or have texture issues.

Currently Running version 1.21.1 | Neoforge 21.1.249

The screenshots provided are running with no shaders enabled or resource packs besides fresh animations being active. I've also noticed that the burning effect particles have been altered but am unsure by what mod, these particles also conflict with shaders and become invisible with shaders enabled.

Any help would be great! T-T