I recently purchased a second hand Mavic Pro from Ebay as a Training / Currency Drone. When carrying out initial test flight, it required a compass calibration but the calibration failed on the front compass. It turned out that there was an issue with the compass module in the nose which was replaced.
Since it has been replaced I now get a Compass Error every now and again. Further testing it appears that it happens when I am in S Mode and flying at max speed, the nose dips in flight and the compass error message appears and when I reduce speed it clears and all is fine. When operating in P mode it is fine obviously because the nose does not dip as far as it does in S mode.
Looking at my logs on Airdata, it says it is a common problem and the severity is Low Risk.
I have recorded in my logs that the aircraft is not to be used for Operational tasking and just to be used for currency and training flights and care to be taken in Sport Mode.
My question is, has anyone else seen this issue and was there anything they did to fix it?