Drone has been amazing, I've been flying at a friends farm for the last several days and it has really boosted my confidence with no issues or problems. But a few min. ago when taking off my transmitter started beeping as it was taking off which is a first. I flew around a bit and manually moved over the landing pad to land and again the beeping sounded. To date this is the first time this has happened. Can anyone fill me in as why???