Steps to Reproduce:

1. Go to a biome.

2. Whait for an entity to spawn.

3. Step back until it despawns.

Observed Results:
When stiping back an entity, causes it to despawn.

Expected Results:

Entities should not dispawn when the player is away, only when chunks are not loaded

(Examples PINNED on the comments section)

(NOTE) Its seems to just happen when naturally spawned mobs