Lately, though the no-fly zone maps have NOT changed, when I take off from my home, I get no-fly warnings even having gone up about 20’. I believe the warning has to do with altitude. My home is on a ridge that is 680’ high, but historically the drone has taken that home-point as “zero” elevation - in fact when I fly down the hill I get negative altitudes from home. Now, it would appear that the software thinks I’m over 400’ at the start. The drone will hover at that point and after about 30 seconds of struggle, I can override and fly (and I always stay below 400’). Any thoughts why it’s doing this?