One of my scores has broken, easier to see rather than explain.
It seems this score, which I have had uploaded with no problems for over a year relatively recently decided to have small and large black lines all over the score, which all I can really say is it might be connected to the font, though it has worked fine until now.
I have to note these lines do not appear in the software, but on the website.. so might need to post it there..
Comments
If it is not happening in the MuseScore program but only on musescore.com, then indeed you'd need to bing it up there, like in https://musescore.com/groups/improving-musescore-com/