What Feature Types Apply to This Bug?

Server, System

Other Type

No response

What Type of Bug Is This?

Crash

Forge Version

39.0.40

The Aether 1 Version

1.0.0

Is This Bug a Conflict With Another Mod?

No response

Client Log

No response

Crash Report (if applicable)

https://gist.github.com/kodadacod/3013a4a472c9402df800f2b6945192ed

Steps to Reproduce

1. Join a server (with the aether installed)
2. Enter the aether (with eternal daylight)
3. Leave the server
4. Enter a singleplayer world
5. Leave the singleplayer world
6. Rejoin the server

What You Expect To Happen

The game does not crash

What Actually Happened

The game crashed

Additional Details

No response

Please Read and Confirm The Following

• I have confirmed this bug can be replicated without the use of Optifine.
• I have confirmed this bug is on the most recently supported version of Minecraft.
• I have confirmed the details provided in this report are concise as possible and does not contained vague information (ie. Versions are properly recorded, answers to questions are clear).
• I have confirmed this issue is unique and has not been reported already.