No noteheads, no rests, dynamics gone, accents and other markings missing, etc. Don’t know what else is destroyed but this is obviously bad enough.
https://stash.miloonline.net/dorico/dorico_3.5.10_score.png
Seems to play back properly, though.
Dear Milo,
You know you must restart your computer after an update, right? 
Whoops! Right. smacks forehead To eager to get at the new features!
Restarted, everything’s fine.