So I built a tank, followed all the placements, etc, but when I clicked the bottom center of a side (not on the fence layer), the game froze, then crashed after a few seconds. Restarting Minecraft then re-opening the world crashes the game. I had to use UniversalMC to edit the world and remove instances of immersiveengineering:tank TE's to make the world load in. After loading the world in, the area of the tank looked wacky. Seems like each block of the multiblock had turned into a multiblock.

Initial Crash: crash-2020-05-17_17.22.14-client.txt

TE's that had to be removed from UniversalMC:

Screenshot in the world after removing TE's:

Does this happen outside of a dev environment? The field missing in the crash should exist, but I don't trust Forge's runtime deobfuscation 100% and it seems like the most likely cause for this crash.

No, also, in the dev environment, seems that the tanks are transparent, you can basically walk through them...

If this is a dev only crash, we're not gonna dig into it further