Some notes aren't played when under a slur

Issue type

General playback bug

Description with steps to reproduce

Use Muse Sounds

Flutes and oboes (and possibly more) in all dynamics:

1. write melody
2. double an octave up/down in the same voice
3. add slurs
   actual behaviour: the lower note is much quieter if it's even played at all at the end of the slur
   expected behaviour: both notes should follow the given dynamics (as well as the instrument can) and the last note under the slur should not disappear

Violin section (and possibly more):

1. write melody with slurs
2. set dynamic to piano (this happens less with louder dynamics)
3. apply "Classic Phrasing" flag
   actual: the last note is sometimes very quiet
   expected: the last note should follow the given dynamic

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/9256db7a-1235-43a2-ace6-a5b08dab6173

https://github.com/user-attachments/assets/f9bc3204-7ea3-4b18-97b8-6dba57829a2e

slur bug score.zip

While making this minimal file I checked MS Basic and it doesn't have the issue
The violin section example had the problem when I initially put it in the score but it magically fixed itself when switching sounds to violins 1 and back to violins 2 (the screen recording is of violins 1 in a different score)

In which versions of MuseScore Studio is this issue present?

4.5.2-4.6.0

Regression

Choose option...

Operating system

Windows 11

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