Individually styled measure numbers lose styling on toggling MM rests.

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

1. Create new score
2. Select a visible measure number and change its style in the Properties panel
3. Toggle multi measure rests on.
4. Undo. (Or toggle MM rests back off).

Expected behaviour:
The measure number retains its custom styling.

Current behaviour:
The measure number reverts back to default.

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/5b508a84-bf27-4c13-8a41-102a0124f0ea

In which versions of MuseScore Studio is this issue present?

4.6.5 – main latest nightly

Regression

Yes, this used to work in a previous version of MuseScore 4.x

Operating system

Windows, macOS

Additional context

Reported and discussed in https://musescore.org/en/node/394552

As the screen capture shows, excluding an earlier measure from the measure count does not make the styling revert back to default, even though the actual number updates. Changing the time signature or the measure number frequency in Format > Style does make it revert.

The latest version this worked in was 4.5.2

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible