I am a noob to the RC world, I do my Pre-flight check religiously as per DJI instruction, Inspire is my first RC unit. I have a question/problem: I am getting compass failure mid air for 3-5 seconds approximately 10-15 seconds after airborne. First time this happened was a few days ago while we were on Honeymoon in Bora Bora, it was my 4th-5th Flight, I calibrated my compass as per system requirement, made sure I had more than 9 satellites, and took off from the deck of my above water pontoon. About 10-15 seconds after I took off I got this compass failure message on my screen, I look up, the Inspire is slowly spiralling in the sky (altitude between 4m-8m), it seems I have lost control of the horizontal movement of the copter, I look at my screen to see if there is anything I can do, meanwhile my wife is screaming at the background about the copter is going to hit the water that’s when I raised my head and realised the copter is only 2m above the sea, I tried to stay calm and elevated the copter slowly, a disaster was averted… the loss of compass was only about 5 seconds but it made me shxt bricks. I launched my copter again yesterday at home, still got this compass failure very briefly for 3 seconds shortly after I took off, again I moved the copter up to avoid hitting a tree. I only have this compass failure within 10-15 seconds after I took off, its a very short period of time, and never again during flight. Has this happened to you? Have I done something wrong in the pre flight?