Armor Model with color from ItemsAdder doesnt work

Hello everyone, maybe somebody can help me. I've updated my server from version 1.20.1 to 1.20.4 and suddenly the textures on leather armor models have stopped working correctly and only show the color. Any idea why? In ItemsAdder they are displayed correctly.

Code ItemsAdder

info:
  namespace: null_armor
armors_rendering:
  null_set_armor:
    color: '#94007a'
    layer_1: null_layer_1
    layer_2: null_layer_2
    use_color: false
items:
  null_helmet:
    resource:
      model_id: 2007
      generate: true
      textures:
      - null_helmet
    specific_properties:
      armor:
        slot: head
        custom_armor: null_set_armor

[Legacy attachment omitted]

Code MythicsMobs

null_helmet:
  Id: leather_helmet
  Display: "<gradient:#c70fd4:#550680:#c70fd4>Helmet of Null"
  Attributes:
    Head:
      Armor: 50
      KnockbackResistance: 10 MULTIPLY_BASE
  Options:
    Unbreakable: true
    Color: 148,0,122
  Model: 2007

[Legacy attachment omitted]