Forge version: 14.23.5212
Twilight Forest version: 3.3.212

There are two issues I found.
Steps to reproduce:

1. Wear any Helmet Armor (excluding Fiery Helm)
2. Wear any other Fiery Armor piece in any other slot

AND

1. Wear Phantom Plate
2. Wear any Legs Armor with an enchantment attached

What I expected to happen:
The armor would render as normal in both instances

What happened instead:

1. Any Helmet Amor is darkened
2. The enchantment effect from the legs is extended to the chest (but not the arms)

Issue 1 should be fixed by f4de33d.

Both issues appear to be resolved.