How to regain command of your drone after a temporary failsafe.
In the event that a failsafe is triggered and clears on its own, the aircraft will still remain in the failsafe flight mode. In order to switch the flight mode back to LOITER and resume operations (if it is safe to do so), the pilot will need to press a non-illuminated LOITER button.
Example: If A is illuminated when the failsafe triggers, pressing B or C after the failsafe clears will put the aircraft back into LOITER.
Explanation: The flight mode doesn't change unless the flight controller sees a change in PWM, so even though button A is illuminated (for example), the flight controller won’t recognize that state until the PWM signal changes.