Haven't done it yet, sorry. It is visible better in challenging lighting conditions, not on a cloudy day. But took this one today just to demonstrate something. It is shot with "Grading — Auto". Pay attention to the road's surface, it shows terrible liquid-like shadow artefacts. Should the Grading be fixed, it wouldn't be there.
Thanks for posting this, as I just ran into the same thing when I shot some footage yesterday. I have now set the Gradation from Auto to Normal, glad to find the solution to this flicker issue right away.
Might seem a silly question but I can't find any menu item called "grading". Where is this???
I did find something called "gradation" (in the onscreen menu when I press Ok) - though weirdly this is not in the normal main menu - what a nightmare of a system!
With video recording I constantly get seemingly random flashes which look like exposure shifts. With manual exposure and manual white balance these are reduced but still appear from time to time for no obvious reason.