All of a sudden I am getting compass calibration errors in places that I never got before. I almost always launch from my back yard. Up until last week I never got the error. Now I get it almost every time I start my P3A. Now I have to restart almost every time I want to fly. I must add that this is a new p3a as I drowned my previous p3a. Still strange this is happening. I have calibrated the IMU and recalibrate the compass in an area that was devoid of any metal in the area. Any ideas?