Describe the Bug

I had a train with a storage vault on it. Then, I created a moveable contraption with andesite funnels on it to siphon items from the vault when the train came around. I used a gearshift to move the contraption back and forth. When the contraption pulls away from the train, it works fine, but when it extends, it crashes.
(I had to compress video as ZIP, sorry).
Edit: I removed the andesite funnels, everything. And, the andesite tunnels as well. The ONLY things I have on are conveyor belts, and shafts. But yet, they crash STILL.
Edit 2: I tried moving the contraption with a gantry shaft. Worked fine.

Reproduction Steps

1. See above description

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Expected Result

For it not to crash?

Screenshots and Videos

Uploading Minecraft_ 1.18.2 - Singleplayer 2022-07-12 09-42-35.zip…

Crash Report or Log

ava.lang.NullPointerException: Cannot invoke "java.util.ArrayList.stream()" because "this.keys" is null

Operating System

Windows 11

Mod Version

0.5.0

Minecraft Version

1.18.2

Forge Version

40.1.0

Other Mods

none

Additional Context

No response

Yeah. Ok. So, its NOT just the gearshift.