All updates on everything has been installed. Despite recalibration of sticks and IMU, the motors, after the first flight and landing and hands off of everything, will slowly increase rpm to the point the bird will want to flop onto one side. Prior to the first flight of the day, I can start the motors and they will idle at a steady speed - probably until the battery is depleted. After a flight and landing, and releasing the sticks, 20-30 seconds will pass and then the rpm's begin to increase. Pulling down on the left stick almost to engine cut off position has no effect. All the way down does shut off the motors. If I shut everything down and restart the RC, wifi amp, and Phantom from scratch, the problem again occurs after the initial flight. Anyone else experience this?