Bug: Advanced UI Background Colors Resetting

Continuing the discussion from Regression: Simple Window Colors Settings:

If one sets e.g. the Rhino.UI.ThemeSettings.Frame.Background value to a custom color using the Rhino Options > Advanced menu, then goes to the Rhino Options > Appearance > Colors menu and simply presses Cancel, the Rhino.UI.ThemeSettings.Frame.Background value is reset to the default value:

Hej Anders -

As you can probably tell from the title of the bug report, I would call that the expected behavior but I see that this behaves as you expect in all other cases… Oh well…
RH-77221 Options: Cancel to close dialog reverts changes
-wim

I see how my video didn’t explicitly capture the bug, have a look at this one:

Hi Anders -

I didn’t check the videos. Is there something wrong with RH-77221 Options: Cancel to close dialog reverts changes?
-wim

Yes, the second (30 second) video demonstrates the issue (I open Rhino 8 where I have already set GUI colors via the advanced menu prior, then navigate to Appearance > Colors, click Cancel, which resets the GUI colors).

I cannot repeat that behavior here. Cancel will cancel any changes I make to colors, not revert things back to default.