Grace notes don't convert to midi properly

[MqcCheeze]

Issue type

Import/export issue

Bug description

When playing a passage with grace notes within MuseScore they are played correctly at the correct time and everything. However, exporting these grace notes to MIDI, they do not play as they should do.

The passage in question

The MIDI export

Appoggiaturas work fine as normal, its only acciaccaturas that do not work. They do not sound the same in MIDI as they do in MuseScore.

Steps to reproduce

1. Write a passage with acciaccatura grace note.
2. Export to MIDI
3. Play MIDI

Screenshots/Screen recordings

https://github.com/musescore/MuseScore/assets/87596784/4fc25366-8939-43f2-aba7-1faf9204c221

MuseScore Version

4.2

Regression

Worked in 4.0.2 (see comment)

Operating system

Windows 11

Additional context

#22111

[MqcCheeze]

Have to enter the following to get around this issue

[DmitryArefiev]

It was broken in 4.1.0

https://github.com/musescore/MuseScore/assets/90187801/41a70c3c-dd1c-4de0-b0d8-8e6ed01eff18

( MIDI export (4.1 score).zip can be used for test)

[scorster]

Related to

https://github.com/musescore/MuseScore/issues/18624

[regalryder64]

Possible quick fix for others facing this issue: export to MusicXML, open in Musescore 3 (or other notation software of choice), fix any errors caused by the export/import, and export from Musescore 3 to MIDI.

[abariska]

Possible quick fix for others facing this issue: export to MusicXML, open in Musescore 3 (or other notation software of choice), fix any errors caused by the export/import, and export from Musescore 3 to MIDI.

The way you described is workaround, not a fix :-)