When you set a brightness slider and connect it to a picker, the color picker doesn't respond to slider update, unless the user starts dragging the handle.
To avoid this unexpected behaviour I suggest to set colorPicker.currentHandle = colorPicker.handles.last when a handle is added to the picker.
When you set a brightness slider and connect it to a picker, the color picker doesn't respond to slider update, unless the user starts dragging the handle.
To avoid this unexpected behaviour I suggest to set
colorPicker.currentHandle = colorPicker.handles.lastwhen a handle is added to the picker.