Looks like you fixed your issue. Just wanted to drop in another tip. I wear a Fitbit fitness tracker as a watch. It has a stainless woven band that uses a very strong neodymium magnet as a clasp. I was having compass calibration and failure issues constantly and could not figure out what the deal was. I looked down at my watch to document the failure time and the little lightbulb in my head lit up. Took off the watch and put it in the car, problem solved. I do notice that the Mavic is VERY sensitive to electromagnetic interference, much more so than my P3P.