Lines: if a system break is applied, UNDO does not restore the lines correctly
S3 - Major
MS 3.3. (but probably older)
- Open the attached score.
- Apply a system break at the end of measure 4.
- Now UNDO.
Expected result: Lines should be restored to the status quo.
Actual result: Lines have lost their custom placements.
Adding to #303762: [EPIC] Collection of Undo issues