Can you help me to diagnose this crash?
At first, I flew my aircraft for 10 minutes and landed successfully. Then, I took it off again and flew for another 4 minutes. I used return home button and it returned successfully and hovered on top of my head (40 meter height). Then I started to land it manually (I had one bad experience about auto landing so I always do it manually later on). When it was down to like 14 meters, it suddenly started flipping over and then I saw Warning-Motor idling (loose or missing propeller) on my app. It kept flipping over and crashed. (Notice that the warning was after it started to flip over)
I don’t believe I made mistake on installing propeller since I made sure each of them are tight before taking off and it had flew for 14 minutes.
here is my flight log:
Any thought will be helpful! Thanks