Okay, I deleted the music except for a few spots with glisses. Be sure to try it out on all of the notes, as sometimes the first gliss on the violin works as expected. The others snap back to their original position when I try to move them but they did in fact move. I can see the updated position only if I save and reload.
I tried uploading it here but it said that the file was too big so I placed it here: Gliss-BUG.dorico
Are you seeing this behavior? If not I can make a video and upload that as well.
Thanks!
B