String number under slur interferes with slur.
1) Create a simple score with 4 notes.
2) Create a slur of all 4 notes.
3) Select a note.
4) Drag a String Number from the Fingering Palette to a note.
After a relayout, e.g. adding or moving an element, the layout changes and the expected result is shown.
When the file is saved and reloaded the slur is again to low. This is the same as in issue #297501: Layout shift of slur after reload.