Edit: It’s even worse.
I now click the title bar of RC to focus RC. This works.
But it doesn’t focus the 2D image view where the actual image is shown.
I do have to click the 2D image area.
Why do I need focus on the 2D image area? Because I use the left / right cursor key to cycle through the images.
Without focus on 2D view area, this is not possible.
I can click “Control Points” in the upper menu to disable Control Point placing, but that is very time taking.