Its a new thing, all seems fine, my battery reaches 15.0 volts and I bring it back to land, all seems fine intil it reaches about 15 feet of altitude from takeoff point and it just hangs there, satelites seem fine 15, full down left stick, no response, tried tapping red start button, no response, it will go up, but settles back at 12-15 feet, to high to hand grab, flip rth and obst avoid and control came back, happens about every 5 flights, gonna try again and check s16 readings carefully. Any ideas before the battery runs out next time, maybe try to land over a big blanket or trampoline