Empty fretboard diagrams are mis-positioned

In Version 2.1.0, create a new score, create custom fretboard diagram palette containing one diagram with some strings marked and one with no strings marked (no dots, no O or X above). Drag these to the score. The empty diagram is placed lower than the other. See attached image.

Not sure about other instruments but in ukulele music the O for open strings is often not used, and the empty fretboard diagram is not uncommon (it's Cm6 or Am7).