I'm testing on a existing game that have a heavy gunship constructed (deployed). When I load the game with your update, the aircraft vanished! I assumed that 'Spidertron Control Center' have this entity indexed and was unable to find it. The dev failed to handle this case and the game crashs!
I tested loading my game with a older version of your mod and deconstruct the aircraft and saved the game. After updating your mod again, everything works fine. I just needed to produce and build the Heavy Gunship again!
I'm just guessing this is the problem!