After v1.0.1 upgrade, when adjusting a setting with the slider control (for example the face recovery level) one or more adjustment sliders may remain on-screen even after another adjustment is selected or the photo being edited is closed. The slider, or rather the image of the slider (sprite?) may prevent the use of another adjustment that is now hidden behind.
This happens with the face recovery adjustment but has also happened with other adjustment like denoise strength, etc.
Here are some examples after closing a photo (1) and trying to edit a new photo (2)