I was flying a mission with Litchy. In the settings I told Litchy to fly back to WP1 after completing the mission. I was waiting for the bird to arrive and when I saw the bird it was flying towards me while losing height. Flipping the switch to ATI mode to gain control did't work. It flew straight into a tree. I couldn't stop the engines. I just had to take the battery out with the props spinning. Fortunatly there is only a chip of the reinforced plates and two props are broken. Everything else looks fine. UAV bits reinforced plates, don't fly without them.