MuseScore 4.2 doesn't "remember" microtonal accidentals

[ComposingPlanarian]

Bug description

I don't know if this is an already known issue, so I'm writing this report.

If we have multiple of a note in a measure, and the first one has an accidental, but the rest have no accidentals, then the accidental applies to them all. But MuseScore doesn't reflect this for microtonal accidentals. The first one is tuned correctly, but the rest are still treated as natural. In order for the playback to sound all of them correctly, the microtonal accidental needs to be added to all notes.

I don't quite know how MuseScore works with accidentals, but it seems clear that it isn't working with microtonal accidentals in the same way as it is working with regular accidentals.

Nonetheless, adding preliminary microtonal support is a good step for MuseScore. I can't wait to see it become implemented more fully.

Steps to reproduce

1. Put a quarter note F in a measure
2. Give it a half-sharp (or another microtonal accidental)
3. Input more Fs in the same measure
4. Musescore doesn't "remember" the half-sharp accidental for them

Screenshots/Screen recordings

MuseScore Version

4.2

Regression

No.

Operating system

Windows 10

Additional context

No response

[cbjeukendrup]

The underlying problem of this issue is most likely the same as what's described in this comment: https://github.com/musescore/MuseScore/issues/20162#issuecomment-1824880822

[Jojo-Schmitz]

Came up via https://musescore.org/en/node/358028

[ComposingPlanarian]

A user also noted that microtonal key signatures aren't reflected in the playback (https://musescore.org/en/node/358847)

[Jojo-Schmitz]

Also in https://musescore.org/en/node/361288