Describe the bug you're experiencing

Although 1.12 is not the main supported version, there is no other alternative except farsight.
This problem may be caused by optifine, but on 1.12, only optifine provides shader support, so I can't give it up. If you can't fix this error, can you consider providing a copy of the 1.12.2 source code for our personal modification?

Reproducability

When optifine (any version) and farsight are installed at the same time, moving into some chunks will cause entities to become invisible (player, mob, animal...)

Mod up to date

• Before submitting this issue I updated to the newest version and reproduced it

Minecraft version

1.12.2

Modloader version

Forge

Logs

https://paste.vg/nfdvusal2q

ye that is an old optifine bug, nothing on farsight touches the entities, it only keeps chunks around, so doubt you'll be able to fix that on farsights side. https://github.com/someaddons/farsight/tree/1.12 1.12 is visible here