Issue type

Engraving bug (incorrect score rendering)

Description with steps to reproduce

1 Place an Abm chord symbol in any measure.
2 Select “Realize chord symbols”
3 Yu´ll see/hear that the c flat note sounds an octave lower even though it is written in the correct position.

The same occurs with the note C flat in the F5- chord. Similarly, this happens with the E+ chord, whose note B sharp sounds an octave higher even though it is written in the correct position.

The same phenomenon occurs with other chords that include these notes (C flat and B sharp).

Supporting files, videos and screenshots

https://musescore.org/sites/musescore.org/files/2025-12/just%20realized.mscz

In which versions of MuseScore Studio is this issue present?

4.6.4 y 4.6.3 at least

Regression

Yes, this used to work in MuseScore 3.x and now is broken

Operating system

Windows 10

Additional context

No response

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