It would appear that the "Drawer with Front" module uses your contour pen to define the colour of it's surface... There is a parameter for it, but it is set to 0 and is inaccessible in the UI. Object unchanged from 22/28. I feel like GS should just not hide the All Parameters list as there are quite a few objects that have parameters missing in the UI.
Same issue I just stumbled accross myself.. wonder if 28 has this fixed! Also one other thing I don't understand is why the knobs and handles available are not the same from all library parts. It's impossible to keep consistency and forces patching up which I really don't like doing
