I don't know what HUD you are using, so I can't do it myself, but I think you either need to adjust the z value of the face icon or of the viewport that holds it if the bg and face are using different viewports.
I would imagine that there are two separate sprites, one for the bg and one for the face and in the same viewport, so you need to find whichever sprite is holding the face and make sure the z value is higher than the bg sprite.