I have been on travel for a week and missed my bird so much that I had to take it for a evening flight when I came home. It was cloudy and it had been raining but now the wind was calm. I waited for Home Lock, and waited and waited. Could only get 5-6 satellites. (Usually get 7-11 from same spot) Tried another more open location. Waited a long time and finally got stadey green lights and 7 sats. Took of and let it hover as I always do for a while to see if all was normal. After some minute I decided to fly some 30m away and 15m up. Then I noticed that the back wings stopped blinking green and instead red like on low battery. At this point my bird started to live its own life! Drifting a lot in random directions. I COULD NOT CONTROL IT! Not decent or anything! I was ready to do a "emergency" rotor-shut-down but realized that every now and then it got satellite signal (7 satellites) for 3-5 sec. The back wing lights turned to green blinking again and meanwhile I could get back some control. But only for some 3-5 sec at the time! Eventually with a lot of effort I got it down for a hand-catch. I realized that if there is a satellite issue the control is completely lost! The altitude was also showing very different values all the time. +- some 50m! I think many fly-aways can be related to satellite lock! I think that if you go under 7sats after takeoff it will set a new Home Lock position in a rather random place. Then it will try to fly there and on the way it might lose satellite lock again and then get a new position even more far away! Just checked this site: http://www.multirotoruk.co.uk/solar-weather I realize now I was a fool to try fly with dodgy satellite connections! EDIT: If it was not a night flight and it was very close so I could see exactly what direction it was I don´t think I would have made it back! I am 90% sure that RTH would have not done anything at all to help since the satellite connection went in and out at random.