MIDI sixteenth note triplets imported improperly

Issue type

Import/export issue

Description with steps to reproduce

When I import this MIDI file containing sixteenth note triplets, only some bars are properly rendered as triplets. Others are converted to sixteenth note-thirty-second-note-sixteenth note pairs, and some are part of septuplets. There is nothing wrong with the MIDI file to the best of my knowledge.

Supporting files, videos and screenshots

pizzicato2.mid.zip

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

4.4.2.242570931

Regression

I was unable to check

Operating system

Mac OS 12.7.3

Additional context

Cakewalk Express re-opens the same MIDI file and renders the notes properly. The time signature is 3/4, nothing crazy.

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

Start by reproducing the import with the attached pizzicato2.mid.zip file in MuseScore Studio and compare the rendered sixteenth-note triplets with the expected notation described in the report. Trace the MIDI import path and its rhythm or tuplet interpretation, then verify that the affected bars render consistently as triplets without regressing other MIDI imports.