Can't figure out how rests are handled. I attached an example but it seems to occur a lot. I moved the rests a little to make them more visible.
In keyboard writing 1 voice might change from triad to one note to a 3rd and so on while on the same staff another voice is just a one note melody. This is pretty common even in Mozart but you can't expect Musescore to figure it all out. It would be nice if we could suspend it's rule following and just stick in or delete whatever we wanted.