Describe the bug you're experiencing

Using this with CustomNPCs mod will result in not being able to contact all npc entities after player death
But you can see an NPC there
You can only see it after re entering the server

Reproducability

everywhere

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://gist.github.com/DreamSoulFire/917e42842d0b79461bd4725e860f4560

When I delete optifine, this problem still exists

Not updating 1.12 anymore and it looks more like this is an issue of custom npcs