Can constraint-type contour plot cover entire plot area?

When making a contour plot that uses type=‘constraint’ and operation = ‘][’ , setting the value = [data-min, data-max] creates an empty plot, instead of a completed shaded plot. If you adjust data-min to be slightly larger or adjust data-max to be slightly smaller, then you get a nearly completely shaded plot. Is there any way to get the plot completely shaded when using the real data-min, data-max values?

Here is a link to a CodePen that shows the problem.