Occasional ISE - There is no context available for qualifier org.jboss.arquillian.drone.api.annotation.Default.

Both the TestInstanceEnricher (DroneTestEnricher) and ScreenshooterLifecycleObserver has the very same precedence = 0, so it is just question of luck what is called first. When the ScreenshooterLifecycleObserver is called before the DroneTestEnricher then no instance of Drone is available and this exception is thrown.