I have had a successful loiter flight with my quadcopter having Arducopter 3.6 at around 13 meters.
It was very stable. Here is a video https://www.dropbox.com/s/1p39qwpts5ufhs0/WhatsApp%20Video%202020-12-20%20at%2010.24.34%20AM.mp4?dl=0
Then, when I made a LAND command, the copter suddenly started to move upward instead of landing until it reaches 30 meters, then just dropped from the sky and crashed.
Nothing is really clear. I have analyzed the log file but I could not find any clear reason.
log_7_2020-12-20-10-03-48.bin (949.5 KB)
I would appreciate if anyone can help us understand why the LAND mode resulted in flying up and then crashing instead of landing as it was expected.
Thanks in advance