So I tried everything, even opening up a new file and trying to animate the same action for a simple cube. It doesn’t work I guess because of the version of Blender… maybe. I noticed that it does not let me insert a keyframe anywere it is not needed.
If I key a cube at frame 1 in location 0, 0, 0 and move it and make another key at frame 10 in location 5, 0, 0 and then I am draging to the frame 5 let’s say and simply insert a keyframe without moving anything it does not work. Maybe it is because Blender does not need to see another recursive keyframe there.
My question though is why even bother using the “Available” keying set when animating while it is possible to animate the same way without any keying set selected?