Has anyone experienced 30+ FT altitude difference on P3 Pro when comparing sonar vs altimeter? During initial take off all good but when you go fly around and come back to a sonar altitude, altimeter reads higher (as high as 30FT sometimes). I contacted DJI support and their recommendation was to do compass calibration, which didn't make sense technically, and I do regular compass calibration anyways. See attached picture. Is this normal?