Issue type

File corruption

Description with steps to reproduce

1. Import the attached MIDI file (triplet_8th_test.mid)
   • Measure 1: 4 quarter notes
   • Measure 2: 6 triplet 8th notes + 2 quarter notes
2. Click on the "3" bracket above the triplets in measure 2 to select the tuplet
3. Press Delete

Actual behaviour:

• The first note in measure 1 (beat 1) is replaced by a rest
• Measure 2 is left without any rest filling the deleted tuplet's position

Expected behaviour:

• The tuplet is removed and replaced by a rest at its correct position in measure 2
• Measure 1 is not affected

Supporting files, videos and screenshots

Example file (uncompress it to get the .mid) :
triplet_8th_test.zip

Screenshot:

In which versions of MuseScore Studio is this issue present?

Present in latest nightly build (master, tested 2026-05-12). Not checked in released versions.

Regression

No

Operating system

macOS 15

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