Very possible Capt. it is almost as if I have lost connection between the 16 and H, I fear if I was out farther I would not have control, RTH and it would just hoover till low battery and then descend! Not good at all! Mind you, I was only 1,000 feet out approximately, and in same area before I could get 1.500 + easily!Now you have me thinking... Perhaps (just a guess) that Yuneec has tweaked (in this firmware update) the transmission for the new ST16 Plus with the new external 3 antenna design.