Minecraft Entity behaviours such as behavior.nap and Shareables do not work properly on Custom Entities that have them. When the custom entity uses the nap behavior they sleep in some seconds before waking up and sleeping again. When the custom entity uses the Shareables behavior and has an item or custom item that is equippable like a wearable, they do not equip the item correctly on where to put it, and they won't equip other wearables.