Pixelmon NPCs despawning

So I’m currently using Pixelmon 1.7.2 on Magma (1.12.2) on my server, and whenever I make custom NPCs, they keep despawning whenever I go too far away from them. Is there a way to stop this?

Quote from CookieCreationz

You could increase your render distance or put name tags on them

Increasing render distance won’t work because the survival world is in a whole other world, and then I can’t name them because it just talks to them