This was my reply from DJI
DJI Support here. Thanks for your patience.
We have analyzed the flight records and found that:
1) At flight time 14’52’’, the pilot has initiated a RTH (Return To Home) via the DJI GO app. The RTH height was 30 meters and the drone was with 119 meters high from home point then. The drone started to fly towards the home point despite the orientation of the drone’s head;
2) The pilot has later pushed yaw stick to the right and the drone turned its head to the right and the drone started to fly to the left horizontally;
3) At flight time 15’17’’, the drone crashed into a stone hill when flying left horizontally.
Please kindly note that the drone could not avoid obstacle when it was flying to the left.
According to the analysis result, the incident was caused by a pilot error rather than product malfunction factors, thus we could not provide warranty service.
We really appreciate your choosing DJI. We would love to have you continue using our product, so we would like to provide you a 15% discount coupon for a Mavic Pro drone body (with a battery, gimbal camera, a set of propellers, worth 799$).
To accept this offer, please reply to this email affirming, for example “I accept the offer.”
If you have somehow retrieved the drone, it's most recommended for you to send the drone back to us for a paid repair. For this, please reply to my email for example: "I would like to send the drone back. Please send me a shipping label". After your confirmation, I will have our specialists to contact you for the shipping label.
Should you have more questions, please feel free to let me know.
Warm regards,
DJI Support
As soon as I hit "RTH", my controller said "lost connection." I never pushed it into the rocks.