Version Info

• Minecraft, 1.12
• Chunk Loaders, basic and single chunk loaders

Are you using OptiFine?: yes

Description of the Bug when i am on the overworld the chunkloader on the nether does not load at all

Steps to Reproduce place a chunkloader activated than go to other dimension

Can Confirm, happens to me too. Version 1.12.2, Optifine installed.
Chunks are unloaded when the Dimension is switched.

It seems to be working fine:

If this issue still occurs, please open a new issue and provide the requested version information.