I am updated to the latest firmware. I calibrated the IMU, and I calibrated the compass. The Inspire status LED was flashing slow green, and the RC status LED was solid green. The app said it was OK to take off, the video link was working perfectly, and the gimbal control was working perfectly. But when I tried the down-and-in move to start the motors, they refused to start. Instead, the Inspire status LED flashed red four times, very quickly. I tried power-cycling the Inspire, then the RC, then both. No luck. I have searched the manuals and online resources, but I can't figure out what this means. I gave up, removed the camera, and removed the props. Then I decided to try it again, and the motors spun right up. I put everything back together, and it worked OK after that. Any ideas?