Leading space: reset button inactive when multiple selections made using right-click menu

Win 7/10 / 2.2.1, 51b8386

1. Open the attached file;
2. Right-click on a notehead and select "All Similar Elements."

Expected result: The reset buttons in the Inspector for "Horizontal offset," "Trailng space," and "Leading space" should be highlighted (since these fields have been previously adjusted).
Actual result: The "Leading space" reset button remains inactive.