So I went to fly my FC40 at my Dads today and the first flight and battery the transmitter lost contact with the drone only 75ft or so away. I flew it still until the battery was exhausted. Second battery again I lost contact with the transmitter but I had a fly away and a crash landing but no damage. Third battery I chose to calibrate the compass. This time the drone flew fine and again with my last battery. I flew it maybe 200 ft away and all went well. The first two batteries were third party the last two stock. If that matters? My dad lives in a rural area on a hill top I can't imagine interferance would be an issue. But he lives ten miles from my last compass calibration. Is that far enough away to justify a calibration or could it have been another issue? One more thing both times I lost connection I got the flashing yellow lights. The first time it went into come home mode and returned and the second time was the fly away.