XMR C M10 20210527

Problems:
1/ During the first test, I found that what is described on page 9 of the description in the post-calibration tasks does not happen. During "1. One-click take off / landing". The propeller does not start and does not rise 1.5 meters, does not move!I pressed the back home button on take off didn’t work either, but the by remote controler finally got up as it went along beeped. When I pressed the back home button again, it became uncontrollable, so I immediately switched back on.This prevents the Back Home from performing in flight, but returns to the Home position when the battery is low, I also ask for their suggestion in this regard. The big problem is that the Obstacle Avoider sensor doesn't it doesn't rotate in a circle !!! It works, but only in the direction in which it is set manually.