Glissandos don't paste correctly if a score has parts.
1) Create a new score.
2) Enter two notes, and place a glissando between them.
3) Select the notes, and copy and paste them somewhere else. Observe it works correctly.
4) Go to File -> Parts and create a part.
5) Perform step #3 again. Observe the notes paste without the glissando.
I attached a MP4 in the zip file so one can watch the bug be reproduced.