Would appreciate hearing from any one whose bird lost connection with the Tx after so short a distance. This was a test flight after downloading and installing the new FW to my P3P and RC getting a success txt, following through with a cold IMU calibration, gimble calibration etc. I was flying at a relatively low height (max 40 ft) in an open but sloping convex shaped field with 18 seats. At about 400 yes distance, the phantom suddenly descended to 3.3 feet and then decided to initiate a RTH at my assigned height. I tried everything in the field to re establish connection between the bird and controller to no avail. It was only when I returned home that on first attempt they started to communicate! I think this happened due to my fault in allowing the bird to get out of LOS with the controller and insufficient altitude. At least I hope so, otherwise we are talking here of some malfunction. Anyone withe the same experience?