Curse of binding doesn't work in some slots

The Bug:

Curse of binding doesn't work in some slots.

Since the said slots work like armor slots, it would be expected that the curse of binding enchantment functioned correctly.

Affected Instances:

• Horse saddle slot
• Any mob equipped with or holding an item with curse of binding can still swap the item for another item.

Steps to Reproduce:

1. Summon a tamed horse wearing a saddle enchanted with curse of binding by using the command provided below.

   /summon minecraft:horse ~ ~ ~ {Tame:1b,SaddleItem:{components:{"minecraft:enchantments":{levels:{"minecraft:binding_curse":1}}},count:1,id:"minecraft:saddle"}}

2. Switch to survival mode if not already.
3. Mount the horse and attempt to unequip its saddle.

Observed Behavior:

Curse of binding doesn't work in some slots.

Expected Behavior:

Curse of binding would work in all slots.