Cannot apply non-standard accidental to a note that is modified by another accidental
If a note is indirectly modified by an accidental (i.e. key signature or a previous note in the same measure), applying an accidental that is not double flat, flat, sharp, double sharp, or natural creates a natural accidental instead of the desired accidental.
Steps to reproduce:
1) Create a score with a key signature of a few flats or sharps.
2) Insert a note that is affected by the key signature.
3) Apply an accidental to the note except double flat, flat, natural, sharp, or double sharp.
1) Create two notes in the same measure and apply a double flat, flat, sharp, or double sharp to the first.
2) Apply an accidental to the second note except double flat, flat, natural, sharp, or double sharp.
Expected: Selected accidental appears to the left of the note.
Actual: Natural sign appears to the left of the note.
Interesting enough, if the first note is modified after the non-standard accidental is applied to the second note, or a key signature that affects that note is inserted, the accidental stays (but can't be changed).
MuseScore nightly R.4f8cdbb