I am waiting for new versions as much as others but one positive comment. I made new score from found earlier version of my own. Then I selected and copied 33 bars from it. Added 33 empty bars on 1000+ bar score and pasted it there. No errors of any kind. It was not what I expected. So there seems to be progress...
I think there are less problems with scores native to MuseScore than there are with scores from outside.