Minecraft version used: 1.20.1
Forge version used: 47.3.5
3D Skinlayers version used: skinlayers3d-forge-1.6.6-mc1.20.1
ParCool version used: ParCool-1.20.1-3.2.1.2-R

My issue: ParCool has a sprinting animation separate from the vanilla sprint. When used, 3D skinlayer's first-person hand layer warps backwards resulting in an unwanted display.

Temporary fix I've used: First-Person Model mod to display a full body character and completely disregard the first-person hand model bug.

Things to note:

• I have did not bother testing the mod with any other of their versions.
• Bug doesn't occur when sprinting normally, only when ParCool sprint is activated.
• I have used the mods together previously back in minecraft 1.19.2, using forge 43.4.2. This issue did not occur.

I've reported this here first with the thought that ParCool shifts the player model into a state unusual for vanilla. Maybe 3D skin layers devs could have a fix? Anyways, nothing major. As I've mentioned, using first person mod fixes the problem by completely avoiding it.