musescore / musescore/MuseScore
Adding multiple local key signatures is buggy
Open
@zacjansheski is already working on this.
Since Nov 7, 2025.
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needs review
needs testing
UX/interaction
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Description
Issue type
UX/Interaction bug (incorrect behaviour)
Description with steps to reproduce
- Open a new score with multiple instruments (e.g. orchestra)
- Randomly add local key signatures to various instruments.
Expected behaviour:
The local key signature is always added to the chosen instrument.
Actual behavior:
At some point in addition to the correct one, there are random other key signatures in other instruments added.
Supporting files, videos and screenshots
Example 1:
https://github.com/user-attachments/assets/49ddc20a-00dd-4527-8e52-d5108fc92712
Example 2:
https://github.com/user-attachments/assets/4c9c7fe6-0d9c-44df-a9fc-0f9ceb3c3f8a
Other random results (notice the bug doesn't always appear):
In which versions of MuseScore Studio is this issue present?
4.5.2 – 4.7.0-253080322
Regression
I was unable to check
Operating system
mac OS 12.7.6
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
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Assessment
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