MS3-RC: Undo problem with lyrics in edit mode

Test Procedure:
1) Load test file "undo_demo.mscz"; Make sure the inspector is visible.
2) Right-click the syllable "me" below the 2nd note (the text, not the note!!) and select "Element bearbeiten" (Alt+Shift+E); note that "Automatische Platzierung" is checked.
3) Remove "Automatische Platzierung" and set an offset of Y = "4.00sp".

4a) Press Strg+z ("Undo") or
4b) Click on an empty space (end edit mode) and press Strg+z ("Undo").

In both cases the syllable hangs down with the offset 4sp; neither Strg+z nor Strg+Shift+Z do anything.

In V2.3.2, at 4a) a pop-up "Command undo not valid in current state" appears, but 4b) works.