Tint for item models stops being applied during the pick-up process.

[grian32]

2026-07-21.19-35-35.mp4

In this video I have a custom grass block model

{
  "parent": "block/block",
  "display": {
    "gui": {
      "rotation": [ 30, 45, 0 ],
      "translation": [ 0, 0, 0],
      "scale":[ 0.625, 0.625, 0.625 ]
    },
    "fixed": {
      "rotation": [ 30, 45, 0 ],
      "translation": [ 0, 0, 0],
      "scale":[ 0.5, 0.5, 0.5 ]
    }
  },
  "textures": {
    "particle": "minecraft:block/grass_block_side",
    "side": "minecraft:block/grass_block_side",
    "side_overlay": "minecraft:block/grass_block_side_overlay",
    "top": "minecraft:block/grass_block_top",
    "bottom": "minecraft:block/dirt"
  },
  "elements": [
    {
      "from": [ 0, 0, 0 ],
      "to": [ 16, 16, 16 ],
      "faces": {
        "down":  { "texture": "#bottom", "cullface": "down" },
        "up":    { "texture": "#top", "cullface": "up", "tintindex": 0 },
        "north": { "texture": "#side", "cullface": "north" },
        "south": { "texture": "#side", "cullface": "south" },
        "west":  { "texture": "#side", "cullface": "west" },
        "east":  { "texture": "#side", "cullface": "east" }
      }
    },
    {
      "from": [ -0.001, 0, -0.001 ],
      "to": [ 16.001, 16, 16.001 ],
      "faces": {
        "north": { "uv": [ 0, 0, 16, 16 ], "texture": "#side_overlay", "cullface": "north", "tintindex": 0 },
        "south": { "uv": [ 0, 0, 16, 16 ], "texture": "#side_overlay", "cullface": "south", "tintindex": 0 },
        "west":  { "uv": [ 0, 0, 16, 16 ], "texture": "#side_overlay", "cullface": "west", "tintindex": 0 },
        "east":  { "uv": [ 0, 0, 16, 16 ], "texture": "#side_overlay", "cullface": "east", "tintindex": 0 }
      }
    }
  ]
}

along with this provider:

object ItemColorsListener {
    @EventListener
    fun register(event: ItemColorsRegisterEvent) {
        event.itemColors.register({_, tintIndex ->
            if (tintIndex == 0) 0x7CBD6B else 0xFFFFFF
        }, Block.GRASS_BLOCK)
    }
}

(kotlin but idt super relevant)
and it as far as i can tell the tint isn't applied during pickup, my item model should be more or less correct.