Mobs equipping items from dispensers can despawn

The bug

Based on Bug Of The Week 18: Mobs Equipping Armor With Dispensers

Mobs equipping items from dispensers can despawn.

How to reproduce

1. Summon a monster which can pick up loot

   /summon husk ~ ~ ~ {CanPickUpLoot:1b}

2. Place a dispenser facing it and put for example a carved pumpkin inside

3. Activate the dispenser
   → ✔ The monster is wearing the pumpkin

4. Teleport away and then back to make sure it could despawn

   /teleport @s ~ ~ ~1000
   /teleport @s ~ ~ ~-1000

   → ❌ The monster despawned