Had my furthest flight today, about 2200ft over level terrain though some trees between me and quad. Video got rough towards the end but came back. Was about 15-1600ft away at 250ft AGL when iPhone suddenly said 'disconnected'. I waited, moved, moved antenna orientation to no avail. Walked toward last known location of drone and it never reconnected.... Well, got nervous I lost my new gadget, but go figure, it was hovering right where the map said it last was. Decided to turn off the remote itself to try to re-establish a connection. As soon as remote got turned off the drone immediately did a RTH. When I turned remote back on it connected again immediately and announced the RTH initiation, so I just let it fly home. Landed within inches of home point flawlessly. What happened? Was it just phone/display that lost connection tot he remote (because clearly the quad still had a signal from remote or it would have RTH)? Is correct way to reconnect to cycle app and cable connection to remote first?