Here is the 1st flight report. On this one everything was OK to some extends, although I still do not understand this late feedback ( The drone seems a bit late responsive to RC commands):
Here comes the 2nd flight which went to crash. However, I was not piloting this so I do not know what happened exactly, but what I realized is that after two pitch commands in a row the drone did not respond to pitch back and went forward directly till it crashed.