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Issue description:

Invalid argument from holding machines in mekanism

Steps to reproduce:

1.Pick up machine that has something in it in multiplayer
2. wait a bit
3. Get kicked from server randomly

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

Forge: latest 1.12.2
Mekanism: https://www.curseforge.com/minecraft/mc-mods/mekanism/files/2835175
Other relevant version:

If a (crash)log is relevant for this issue, link it here: (It's almost always relevant)

https://paste.dimdev.org/jikoxihanu.mccrash
[gist / pastebin / etc link here. Please make sure that it isn't set to expire.]

Doesn't have any details about the null pointer, so nothing we can really do