What kind of format are you saving the object as?
If you are looking at the figure InvertHardcopy property, note that it says,
When InvertHardCopy is on, MATLAB eliminates this effect by changing the color of the figure and axes to white and the axis lines, tick marks, axis labels, etc., to black. lines, text, and the edges of patches and surfaces might be changed, depending on the print command options specified.
which is more than just "figures". uicontrols are potentially covered under the "etc."
