See attached screenshot and video from RT-17335
After manipulations, which I made in that video, I find a gap. It can be in the top, in the bottom. On screenshot you can see it in the right bottom corner.

I use this code for content.
        Stop[] stops = new Stop[] { new Stop(0, Color.WHITE), new Stop(1, Color.BLACK)};
        LinearGradient lg = new LinearGradient(0, 0, 200, 200, false, CycleMethod.REPEAT, stops);
        private Rectangle content = new Rectangle(200, 200, lg);
        testedScrollPane.setContent(content);

I can't scroll and use panning, when mouse is over or is dragged over the white gap.