Incorrect pitch when using insert input mode in first measure with alto clef

[L0uisc]

Issue type

Engraving bug (incorrect score rendering)

Description with steps to reproduce

1. Select "new score" on "Scores" page in home tab.
2. Create a new score based on treble clef template
3. Change treble clef to alto clef
4. Change note input mode to "insert"
5. Enter note input mode on the first beat of the first bar.
6. Type "C" to enter C
7. Expected: Note C is input and sounds.
8. Actual: Note is drawn on Middle C (middle line of the stave), but it sounds B4 and is displayed as B4 on the bottom note property display area.
9. Inserting more notes by typing "C" are consistently an octave above the previous one. See screenshot. These octaves are also indicated and sound as B, even though they are technically C.

Workaround: add first note in step time input mode.

Supporting files, videos and screenshots

What is the latest version of MuseScore Studio where this issue is present?

4.5 prerelease 8 Jan 2025

Regression

No

Operating system

OS: Windows 11 Version 2009 or later, Arch.: x86_64, MuseScore Studio version (64-bit): 4.5.0-, revision: github-musescore-musescore-

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

[sammik]

Any clef changed in first measure causes this issue.
(For example bass cleff staff with changed celf to treble in firs measure).

[L0uisc]

Indeed. Should have mentioned it in the report.

[sammik]

Not a regression, same issue in MU 3.6.2 too.