Greetings Fellow Pilots! I had an unsettling experience yesterday. I was flying my Breeze over a construction site in the controller mode. The Breeze was about 90 ft distance and about 85 ft altitude. Everything was working fine. I went into settings to change the camera exposure and closed settings. I still had a good video connection to my Android phone. Then I noticed I could not take a photo. I tried to reposition the drone. Then I realized it was not responding. It was holding a very stable position at the point I last had control. I tried several times to regain control but to no avail. At this point I simply did not know what I could do to regain control. I thought about powering down the controller to see if i could regain control with my Android phone. I noticed that I had the "return home button" on the phone screen so I tapped it. I'm happy to report the Breeze faithfully responded. It gained maximum altitude and returned home precisely where i had launched. This was a great relief because had I crash landed where the drone was flying at the time it would have been in a locked fenced in construction area. Now I'm trying to figure out why I lost control. I had freshly charged batteries on both the drone and the charger. I had powered up both the drone and the controller before calibrating the compass. I did notice after completing calibration the controller had powered down on its own. I found this odd because it should have been fully charged. I powered it back up and made a successful connection. I tested the drone with a series maneuvers before continuing the flight. Everything seemed fine. The drone was located within about 80 ft of "high voltage lines" when the failure occurred. Does anyone have advise as to what caused the failure? Is there a way to switch modes from the controller to the phone mid flight? Is there a way to test the voltage of the controller after charging?