Multiple issues recently appeared with my P3S

[MassDrone]

I've had my P3S since April this year. Recently I noticed some minor shaking side-to-side in my videos. I re-balanced my props and re-calibrated my gimbal, but no improvement. Today things got worse. Now with the Phantom sitting on a firm surface with the motors off, the gimbal spontaneously yaws slowly from side to side a few degrees more or less randomly. And yes, I checked the IMU calibration which was OK. Any suggestions? I'm guessing it has a trip to a DJI repair shop in its future.

The P3S is running on firmware 1.2.40+, which was as received from the factory.

 

[MassDrone]

Update: I chatted with a nice person at DJI tech service. He thought that the problem was in the camera gimbal and gave me a RMA number. They provided free ground shipping to the Los Angeles repair facility. If they don't find any evidence of abuse (and they shouldn't because there was none), they'll repair it and return it to me. I'll keep you all posted as I learn more.