I use either a Samsung Galaxy S7 phone or an iPad Mini 5 to fly my Mavic 2 Zoom. When using the S7 unless I have changed local position a lot it does not ask me to calibrate compass. Using the iPad however asks) me every time even when changing battery. The iPad is a wifi only device but I do connect a Bluetooth GPS unit (Dual Electronics XGPS150) to it. Is the fact that is is not the cellular version of the iPad causing this?