Non-armor items with equippable tag cannot be given to wolves

A non-wolf armor item with an equippable tag that has a wolf as the allowed entity slot still cannot be given to wolves, but it works fine for horses and llamas.

Steps to Reproduce:

1. Download and install the provided resource pack.
2. Give yourself the following item:

   /give @p minecraft:diamond[minecraft:equippable={slot: "body",model:"minecraft:royal_pet_armor",allowed_entities:["minecraft:wolf","minecraft:horse","minecraft:llama","minecraft:trader_llama"]}]

3. Right click on a horse, llama, and wolf with the armor in your main hand.
4. Observe that the wolf does not accept the armor.

Expected Behavior:
The armor should be applied to the wolf's armor slot.

Observed Behavior:
The armor is not applied, and instead toggles the wolf's sit state as if the armor is not valid.