Undo doesn't works after appending a frame

MuseScore 2.0 / Windows7

1) Open "My First Score"
2) Add -> Frames -> Append Frame (Horizontal, Vertical or Text, no matter)
3) Undo

Expected result: the frame is deleted

Current result: the frame remains

To cancel this frame, you must to edit it (double-click), and then Escape

This issue occurs on March 11:

- This Nightly works: 799e1cd

- Not this one: 70b37f9

There is few intermediate commits between the two mentionned Nightlies.