When spawning an entity and clearing its equipment - the client will see default random equipment until they move out of and back into render range. Using F3+i on such an entity shows empty equipment slots in the NBT data even though it appears to the client.

A workaround for this to delay setting equipment requires a minimum 2-tick delay between creation of the entity and setting of the equipment for clients to see the correct state. I'd really like to not have to live with this 2-tick delay.

A possibly related issue is that if entities are spawned invisible the client will briefly see the mob before it goes invisible.

Repro steps:

• set difficulty to HARD
• Call the function below to generate 10-100 zombies to get enough spawned to find one with weapons or armor.
• teleport away or move out of render distance
• return to the zombies and observe that their weapons/armor are gone (as they should be from the start)

void demoEquipmentBug(Location location, int count) {
    for (int i = 0; i < count; i++) {
        LivingEntity entity = (LivingEntity) location.getWorld().spawnEntity(location, ZOMBIE);
        entity.setRemoveWhenFarAway(false);
        EntityEquipment equipment = entity.getEquipment();
        equipment.setHelmet(null);
        equipment.setChestplate(null);
        equipment.setLeggings(null);
        equipment.setBoots(null);
        equipment.setItemInMainHand(null);
        equipment.setItemInOffHand(null);
    }
}