[MS 4] Weird results having both Staccato and Staccatissimo

Issue type

General playback bug

Description with steps to reproduce

Hello, I moved from Sibelius to MuseScore 4 just recently this year. I really liked the progress and the engraving in MS4, there's some issue I have but my experience is overall good, one of the issues is down below:

Having both Staccato and Staccatissimo markings on the same note results in a longer note duration than just Staccatissimo alone.

Normally, it shouldn't be possible to have both Staccato and Staccatissimo on the same note, although some may disagree.

However, if both are present, the note's duration should actually be shorter than with Staccatissimo alone (as seen in Sibelius). In this case, though, having both markings results in almost the same duration as Staccato by itself.

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/513fa49e-e5b8-40b4-a09f-6937a34267c9

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

MuseScore 4.5 Nightly

Regression

I was unable to check

Operating system

macOS, Windows

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