Bug Report

I'm not sure this is a bug, but it is very annoying!

Using my ViesCraft Airship to tool around the Space Station in order to build below the default spawn location (Y < 64) and while constructing a vertical pylon from my northern spoke, as I flew my airship below Y=30, I was suddenly transported, minus my airship, into the Overworld. I don't know what happened to the airship, I suspect it ended up falling way into the negative Y values in the Space Station dimension...

As airships are an expensive pain to build, upgrade, and install modules - this is extremely annoying!

Expected Behaviour

I expected I could safely fly to Y=0 without "falling" out of the Space Station dimension.

Possible Solution

I've not reviewed the source code, so I haven't any code-specific solutions...

But, extending the permissable zone to Y=0 and providing some warnings with a time-delay (say 30 seconds...) so those with appropriate transport can return to the permissible zone would be nice.

Alternatively, setting a dimension specific lower (and upper) build limits, with the "falling" part occurring further below the lower build limit.

And for all solutions, ensuring that one's airship (or other mount) comes with when transporting to another dimension!

Steps to Reproduce (for bugs)

Travel to the Overworld Space Station dimension (by Rocket, by Teleport, or some other means).
Deploy a ViewCraft airship.
Board the airship.
Fuel the airship.
Travel to Y=32 and note what happens when descending below Y=30.
I hope you remembered your parachute!

Logs

• Client/Server Log:
  Client Log: https://gist.github.com/Zarepheth/d8b1dfce8fc278842f1fcf26f687dc1c
  No access to Server Log (someone else maintains the server)
• Crash Log:
  No crash log, there was no crash.

Client Information

• Modpack Version: 3.0.8
• Java Version: the Bundled Java Runtime (whatever version that is)
• Launcher Used: Twitch
• Memory Allocated: 12 GB
• Server/LAN/Single Player: MultiPlayer
• Optifine Installed: No
• Shaders Enabled: No

World Information

• Modpack Version world created in: 3.0.8
• Additional Content Installed:
  Client Mod: Advanced XRay "xray-1.12.2-1.4.2.jar"

Server Information

• Java Version: Unknown
• Operating System: Probably Windows, but not guaranteed.
• Hoster/Hosting Solution: Hosted by a relative on their equipment.
• Sponge (Non-Vanilla Forge) Server: n/a (should be straight Forge server)