Describe the issue

• emissive textures don't render on skin overlays (except for head overlay) with 3d skin layers installed
• tested in singleplayer

Screenshots

• 3d skin layers installed:
  
• 3d skin layers not installed:
  

My setup:

• Minecraft version: 1.20.1
• ModLoader: Quilt 0.19.2 / Fabric 0.14.21 (tested both)
• ETF Version: 4.4.4
• 3d skin layers version: 1.5.4
• Issue persists with only ETF & 3d skin layers installed (without 3d skin layers it works as expected)
• not a known issue as far as I could tell

Is the 3d skin layers compatibility option enabled?

yes, that's from the config file:
"use3DSkinLayerPatch": true

resolved in version 4.5.0