From a network's page in the Android Nebula app, while disconnected, quickly double tapping (e.g. accidentally) on the "Disconnected" toggle will give the error "Error: Trying to run nebula but it is already running". Unfortunately, it does not change the state to "Connected" so at this point it becomes impossible to disconnect. AFAICT, a phone reboot is required to disconnect.
From a network's page in the Android Nebula app, while disconnected, quickly double tapping (e.g. accidentally) on the "Disconnected" toggle will give the error "Error: Trying to run nebula but it is already running". Unfortunately, it does not change the state to "Connected" so at this point it becomes impossible to disconnect. AFAICT, a phone reboot is required to disconnect.