Ok, so I took my drone outside today in to a field.  I had ALT Limit ON, Outdoor Flight ON and Outdoor Shell ON.

I flew the drone away from me and it got about 20 meters then it hit the brakes automatically.  I assume this was due to the signal strenght, anyway I could turn it around ok and started flying it back to me.  When I did this it all of a sudden started climbing and going on its own.  I couldn't control it..  The screen said ALERT ULTRASOUND as you would expect as it took itself over 6 meters.  I ran after it otherwise I was going to lose it completly and managed to hit LAND at which point the drone came down ok.  This was at about 80% battery as I had only just started my flight.

So, now am I nervous about flying it so I took it back to the house and just decided to contine doing an hover on the patio.  I was happily hovering at about 7 foot over the patio when all of a sudden it dropped from the sky and hit the floor (quite hard).  It was as if i had hit emergency land, however I didn't.  All 4 feet LED's went RED along with the system LED in the middle of the drone.  The iPhone app simply said CANNOT CONNECT TO TOY.

I carried it inside and thought I will put the indoor hood on and see if it still works.  So I disconnected the battery to reset it, left it about 20 secs and reconnected the battery (iphone still in app).  All of a sudden all 4 LEDS went as they should and it spooled and went to take off as if it was still flying before dropping from the sky.  The camera started working again and everything seemed normal.  The battery was at approx 25%.

I have no idea why this happen and am very concerned whether to fly it again or not as its an expensive unstable gadget at present (£300).

Have any of you experienced such events?

How did you over come them?

Do Parrot recognise this issue?

Let me know your comments.

Thanks
Mark