Cannot change appearance

After starting a new project I changed some settings in appearance, but I now cannot refine the appearance any further. The colors in the project do not respond to any adjustments made with the color tools. Is this a bug?

My guess is that the colour palette got decoupled from the controls at some point. This is quite easy to do, and a long-standing issue with how the system colour palette can be left open and freely attached and detached from various controls. Usually you can fix it by just clicking on the colour swatch in Appearance twice. It should be hooked up right if the control is shaded.

Thanks Amber.

This does work, but it takes many attempts each time to get the intended change to stick.