I have been having issues described as jello camera, and vibration after updating firmware like many others. I just found a work around on mine till DJI fixes the issue.
When I calibrate the compass the first rotation seems normal, when tipped nose down and rotated till the green lights come on the camera gimbal rotates and will start buzzing and vibrating. If I sit the Phantom 3 professional down on my take off table and then do a gimbal calibration the buzzing and vibration completely goes away. If I then calibrate the compass again the vibration comes back till the calibration on the gimbal is done again. when it has the vibration issue the camera will also tilt about 25 degrees making the screen look like your head is tilted to the side. very distracting when using goggles in fpv. Please try this and hope it helps with fixing others.

Does it happen when you're doing calibration nose up?