If you try to save a blueprint and the leviatron is included in the blueprint because it was flying within the area you selected the game crashes with the following error:
Stack trace logging done
49.147 Error FixedPointNumber.hpp:31: double value not in range for fixed point number: nan
49.147 Error CrashHandler.cpp:643: Received 22
I assume there is supposed to be a flag or something to exclude the leviatron from blueprints like regular vehicles and spidertrons.