General Info

• I am running a modpack
• I can reproduce this issue consistently
  • In single player
  • In multiplayer
• I have searched for this issue previously and it was either (1) not previously reported, or (2) previously fixed and I'm having the same problem.
• I am crashing and can provide my crash report(s)
• I am using the latest version of the mod

Client Info

• Minecraft Version:1.12.2

• Forge Version: forge-14.23.5.2831

• Mod Version: 1.6.9.3

• Java Version: OpenJDK 64-Bit Server VM, version 1.8.0_212

Issue Description

Some of the mobs are for some players invisible, where for other players there is a mob.

Reproduce Steps

Just being in the world

Additional Information

https://imgur.com/a/hbCqeQq

Are any of you using Optifine? and if so can you reproduce the issue without?

I've seen this issue caused by having different versions of forge on the server and client.

I can guarantee you that that was not the case, since I managed and the pack, and the server myself

I had this issue aswell, but somehow fixed itself