Help needed: "micro-jerks" at filming with 5D MK IV

Morning Guys!

I´m frustrated of the film quality of my 5D IV.
I ordered a expensive gimbal for filming and tried it in the last few days.
The films show "micro-jerks". Like you do a timelapse.
I save it on my fast CF Card. The jerks occure at FHS, also in 4K.
I tried all apertures and exposure times and tried all video-codecs in the body.

Do know, which setting I should check also?

Thank you very much