after using the adjustment brush is it not possible to change the adjustment after pressing the Done button(because you don't see a dot like using the radial filter, graduated filter and spot removal)
What is the problem?
You may have "Show Edit Pins" set to Auto. Try changing to always.
If you need to work with the brush close to the pin you can always hide it as you work by tabbing on and off with the H key.
Thanks! It works