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Issue description:

After unloading the world, the cables disconnect from ic2 machines, when using them. To connect them you have to restart the server.

Steps to reproduce:

1. Unload World
2. Use IC2 Machine
3. Connection is away

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

Forge: 14.23.5.2796
Mekanism:9.4.13.349
Other relevant version: IC2: 2.8.109-ex112
Modpack: Enigmatica2: 1.54

Unfortunately I can't reproduce this, could you provide a server log?