Steps to reproduce:

1. New 1.12.2 instance with latest 2860 forge
2. Install ImmersiveEngineering 0.12-97, IndustrialWires 1.8-38, LoliASM 4.4, mixinbooter 3.0
3. Build multiblock with only one flywheel, and form it using hammer
   
   
4. Re-enter the game, still invisible
5. Remove LoliASM, the flywheel back
   

Wait, duplicate with #32