Have a question. All was well first couple seconds of take after compass calibration etc and all of a sudden controller reads compass error and aircraft goes into Atti mode just after takeoff and becomes somewhat uncontrollable. Thank god I was able to land. Question is, has anyone else experienced this. Switch was in P mode but couldn't get GPS after that. Apartment complex that I was never in before and also in a different state. Did IMU calibration as well. Not sure if there was a lot of interference/wires in area. Any input would be appreciated.