Hostile (and some other) entities despawn when out of player range, even when named

[JasonHorkles]

Server this occurred in (in the player tab list):

Main

World this occurred in (in the player tab list):

Main Nether & Main

The coordinates at/near the glitch (if applicable):

N/A

My Minecraft username:

JasonHorkles

What I was doing when the glitch occurred:

Transporting a mob thru a Nether Portal

What happened:

It despawns if nobody is on the other side, and also some mobs will despawn when you exit the area (such as going to spawn), even if they're named

What was supposed to happen:

They shouldn't despawn

Any additional details that should be noted (pictures/videos of it happening, etc):

Possibly a plugin issue

[JasonHorkles]

Seems to mainly be an issue with mobs spawned with a name already, but it should work fine when clicking the mob with a nametag and changing their name