Overlapping Articulations Cancel
Overlapping articulations, regardless of their effects, cause only the most recent of the articulations placed on the note to be played.
To reproduce:
1) Put staccatissimo on a note
2) Put sforzato on the same note
Expected: Note plays both articulations; lesser duration and larger dynamic accent
Result: Note only plays the sforzato, ignoring the staccatissimo completely
Comments
The same problem of multiple articulations on a single note was reported again here: https://musescore.org/en/node/120806