I have got in almost all footage jello vibrations effects. I have this with the DJI 15mm but also with the Panasonic 14-42mm.

When I touch the X5S I can feel a lot of vibration coming from the pan motor, Roll and Tilt are vibrating far less.

Has anyone got the same problem?

Check if anything is obstructing the motor. If not, you have a defective X5S

May want to refer to this post below for resolution:

http://forum.dji.com/thread-86628-1-1.html

I would concur with Mike. Any visuals you could provide, however, would help to verify the possibility.