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Issue description:

On occasion, the following is produced in the console thousands of times in a row:

https://gist.github.com/fcpwiz/c451f106d5f7c993ffb1a066e2d0174b

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

Forge: 2705 (1.12.2)
Mekanism: 1.12.2-9.4.13.349
Other relevant version: SpongeForge: 2705-7.1.0-BETA-3235

One of the positions in the multiblock's list is either invalid, or sponge is somehow giving the wrong TE.

When blocks are broken the list would be recalculated, so something's wonky with your setup.