[1.16.5] Chunks Loader mods don't work with CatServer

[PalmierPale]

Environment

Minecraft version(1.12.2/1.16.5/1.18.2): 1.16.5
Build version(Get from /version command): CatServer-1.16.5-b24635f6-server.jar
Mods/Plugins:

Describe the bug
The chunks loader mods don't work. When we install a chunk loader and restart the server, the chunk loader doesn't load the chunks around it.
It's also possible that sometimes the chunks unload themselves without the server restarting.
This problem doesn't happen when I'm running a Forge server only.

This problem was diagnosed by placing a command block that loops a message in the chat next to a chunk loader. After a while, or after a server restart, the command block stops sending messages.

Expected behavior
Chunks around a chunk loader should remain loaded, even after the server has been restarted.

To Reproduce
Download a chunk loader mod (https://www.curseforge.com/minecraft/mc-mods/chicken-chunks-1-8 or https://www.curseforge.com/minecraft/mc-mods/chunk-loaders)
and place a command block that sends a message in the chat.
Restart the server and the messages stop being sent.

Screenshot/Video
(If it doesn't exist you can ignore it)