Issue description:

Basic mechanical pipe stops working on server reboot.

Steps to reproduce:

1. Place and configure a mechanical pipe
2. chunkunload/reboot server
3. Pipe is visibly empty, but Oneprobe shows fluid in it, no transfer is happening.

Version (make sure you are on the latest version before reporting):

Forge: forge-1.12.2-14.23.1.2601-universal
Mekanism: Mekanism-1.12.2-9.4.3.330
Other relevant version: MekanismTools-1.12.2-9.4.3.330
No generators.
Modpack - https://minecraft.curseforge.com/projects/towncraft

#4676