musescore / musescore/MuseScore

Audio plugin scanner appears to hang after factory reset (UI only: scanning still succeeds)

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#31,508 1 comment 0 reactions 1 assignee View on GitHub

@cbjeukendrup is already working on this.

Since Dec 18, 2025.

P2 Qt-next regression MS4
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Description

Issue type

UI bug (incorrect info or interface appearance)

Description with steps to reproduce
  1. Factory reset
  2. Observe plugin scanner dialog

Scanner progress bar appears to get stuck at 2%. After a while, app opens as expected, while scanning has completed successfully in the background.

Possible Qt issue.

Supporting files, videos and screenshots

https://github.com/user-attachments/assets/8ab61a78-748b-4b5b-9859-842a7fa4a186

In which versions of MuseScore Studio is this issue present?

4.6.0 (does not occur in 4.5.2)

Regression

Yes, this used to work in a previous version of MuseScore 4.x

Operating system

macOS 26.1

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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