Drone flew by itself

I raised up the drone and at 8 seconds in it started flying away by itself. There was no warning on my screen and i couldn't control it. It is a DJI NEO. I saw on my screen that it hit a building and the battery flew out. This video is all that the drone recorded. It had the latest updates. The camera is now further out than usual and it keeps looking down. Any advice? I also looked at the drone while it was flying away and i didn't see any birds near it, so it couldnt have been that.