Tremolo beam between two down-stemmed notes flips after saving-loading if position is adjusted

[LupusCaeruleus]

Issue type

Engraving bug (incorrect score rendering)

Description with steps to reproduce

1. Add two notes with the same duration, then change their stem direction to down.
2. Add two-note tremolo to the first note.
3. Select the tremolo bar between the notes and adjust its position by moving any of the handles.
4. Save, then reload the score.
5. The tremolo bar appears flipped, causing the note stems to stretch. There is no direct way to fix it other than removing the and re-adding the tremolo.

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/2b773bbc-c9a9-4433-ad28-47dbd994673c

This also affects tremolo between notes with different stem directions.

• before saving: _
• after reloading: _

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

OS: Windows 11 Version 2009 or later, Arch.: x86_64, MuseScore Studio version (64-bit): 4.4.0-242390800, revision: github-musescore-musescore-0fcd11b

Regression

No.

Operating system

Windows 11

Additional context

No response

Checklist

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