Hello there and appreciate your work :) Could you please see this?
After binary search handy and I found that with Dynamic Trim installed, some textures in Expanded Combat mod didn't show properly.
version 1.4.1 mc1.20.1 Expanded Combat: https://www.curseforge.com/minecraft/mc-mods/expanded-combat

Forge and <1.20.1 no longer supported. If expanded combat updates to 1.21 and supports neoforge and this is still occurs, open a new issue in https://github.com/Bawnorton/RuntimeTrims