[1.12.2] server Crash for unknown reason.

[lordfriend]

General Info

• [x] I am running a modpack
• [ ] I can reproduce this issue consistently
  • [ ] In single player
  • [ ] In multiplayer
• [x] 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.
• [x] I am crashing and can provide my crash report(s)
• [x] I am using the latest version of the mod

Client Info

• Minecraft Version: 1.12.2

• Forge Version: 14.23.5.2768

• Mod Version: 1.6.8

• Java Version: 1.8.0_111

Issue Description

Reported by other players when they are performing an action not related with this mod (Buy item from a computer of MrCray's Furniture mod). then server crash. the crash log shows it has some relation with this mod.

Reproduce Steps

Not sure how to reproduce.

Additional Information

https://pastebin.com/RZgZ92K0

[Silentine]

I have been told that this may be caused by a coremod modifying entities.