Triplet rhythms don't work in 12/8 violin and viola parts

[BenignPigeon]

Issue type

Playback bug

Bug description

The triplet rhythms in the violin and viola sounds aren't working in a 12/8 time signature. They work perfectly fine in 4/4 with triplet notations [as seen in the video].

Steps to reproduce

1. Create a score with a violin and viola playing continuous quavers.
2. set the tempo to dotted crotchet = 128
3. observe the bug

Screenshots/Screen recordings

https://user-images.githubusercontent.com/85837722/229197265-a3f0abd6-e201-478f-b10d-8faf8c0c1260.mp4

MuseScore Version

4.0.2-230651553, revision-dbe7c6d

Regression

I don't know

Operating system

Windows 11

Additional context

No response

[BenignPigeon]

Here's a reduced copy of the score to see if anyone else can encounter this or if it's just me.

test_score.zip

[MarcSabatella]

I don't see triplets in this score; do you mean the ordinary eighths? These seem to play more or less as expected to me - but not completely. The ones that involve repeated notes - like the patten G-Eb-G, G-Eb-G that occurs over and over in violin (starting in bar 3 for example), create a sense of being off a little, although it also could be a bit of an illusion caused by the rearticulation for the repeated note - the last G is cut short a bit, as if it were marked staccato. Is that what you are talking about?

[Thiago-Morais]

I was looking if someone had already opened an issue about this.

https://github.com/musescore/MuseScore/assets/21369746/cc89e3f9-4006-4b6f-8ab5-ba49e486f2bd

Error - different sounds on 4-4 vs 12-8.zip