Adding a border to a mask

Current State: When you add a stroke to a mask, the stroke becomes an extension of the mask.
Needed Improvement: When you add a stroke to a mask, the stroke is on top of the mask.

This should be so simple, can’t understand why this wouldn’t be the default, but at the very least to have this as an option would be super helpful. 

I understand you can duplicate the shape on top and add the border, but then when resizing the mask you have to resize the shape on top as well, trying to eliminate a step.