Background colour around graphs

Sometimes when I tick “Set data boxes to Background colour” in Setup>Graph Setup> Set Colurs, the white space surrounding the graphs goes to the background color, but usually it remains white. Even if it goes to the background color it eventually goes back to white.

Of course I can make the whole graph area match the background color with “Set Graph Background Colors”, but the effect of just the graphs themselves being white is kind of nice.

Any ideas how to make this happen permanantly?