All systems can be understood as complex sets where each complex system contains and is contained by other systems.
All systems are in constant inter-connection with its internal and external environment.
Any interconnection occurs at a fundamental level, in an exchange of information that produces communication.
If a drone collapse with the ground from the real world, a cybernetic system composed by the comunication of this drone and a ground station can result with a run-time error in the software.
So if we can only understand cybernetics as a duality with infinite feedback, if we broke accidentaly this communication a correct cybernetic system can result with a nice Bus Error or a Blue Screen Of Death.
That is the case of GuerrillaDrone, when last week it crashes a cause of a motorfail and because it was too close to the ground for a rapid recovery. MissionPlanner software also crashes in the same instant.