bug in RadColorEditor: LuminancePad goes black and white

Hi,

When I change the Alpha value (via slider or textbox) to something other than 100%

the LuminancePad goes black and white. the color return only when the alpha value is 100%.

is there a way to override this behavior?

Attached files to demonstrate.

I cannot attach an example project. but what I did was to create new wpf project. added the RadColorEditor, and changed the active sections to HueSaturationPad,LuminancePad,ColorModesPanel.

Thanks.