Relates to MC-229142 and MC-276654.

The bug

If a spyglass or a trident has an associated item model component which points to a model used by a block in the inventory, it will appear darker than other items.

How to reproduce

/give @s trident[item_model="minecraft:stone"]

/give @s spyglass[item_model="minecraft:stone"]

Expected results

Normal shading.

Actual results

Unexpected darkening.

How to fix

Whatever part of code that forces tridents and spyglasses to have separate inventory models from their handheld versions needs to be remade into something that supports components for items as to resolve this conflict.