Villagers (& Tamed Mobs) Despawn (On Realms)

Villagers have been randomly despawning on our current Bedrock realm. The world was created in version 1.18 and the world difficulty is set to Hard. It seems to only happen when no one is on the realm and the cause is unknown.

 

UPDATE: It's not only villagers, but horses, leads, nametaged mobs, tamed pets.