I think I have found a problem in November Desktop, with the new "Maintain layer order" option. The ability to use the bring to front/bring forward/send to back/send backward buttons in the Format menu has no effect on the visuals.
I would expect that this should still work on Desktop/Development and only take effect when published. If the intention is that the bring to front/bring forward/send to back/send backward buttons no longer work, then they should be disabled.