Had a strange thing happen today, I went to a local Historical community here in my home town. I asked my wife to walk along the sidewalk next to the antheneom hotel in Chautauqua. I used active track to track her. All went great, until I "stopped" the active track when she came back to me. I hit the stop icon on the phone and then I just started to fly it myself. I flew back over toward the hotel about 60 -100 feet away and 20 feet in the air. At that point the controller LED went red, the quad started flashing yellow very rapidly, The phone said aircraft disconnected, and the quad went in to RTH. There was nothing I could do to reestablish connection. It rose to 180 feet high, (which is what I set for RTH) came back to the start point and landed. Now what did I do wrong? Should I have stopped active track in a different manner? It all looked good when I stopped it and I had 16 Sats at the time. I uploaded the flight to airdata and it shows the last location at exactaly the point where it initiated RTH, with 16 sats locked. It showed ZERO signal errors. I came home and connected everything up, and I physically walked the quad around my 40 acre property and never lost the connection back to my son who was holding the controller and watching the video on the phone. The quad at that point was shoulder height being walked through the paths I have brush hogged on my property and was, at most times, out of line of site to the controller, never lost signal. Now here is the kicker! When I was filming at Chautauqua, a National Grid Van (our local meter readers and power supplier) drove by me, just as I stopped the active track. Do you suppose that the system they have for reading meters on peoples houses could have interfered with the wifi and "stepped" on the connection? All these Schmucks do is ride around and read the meters wirelessly from the comfort of the vehicle. Thoughts?