Altered Glissando not copied and not saved to a file (data loss)

Reproduce:

1) Open Muse Score
2) Enter two intervals or chords, eg | [CE] [DF] |
4) Add a glissando on C. It will create a gliss C to F.
5) Edit the gliss with double click and Shift+DOWN to have a gliss from C to D
then:
6a) Copy & paste a bar
or
6b) Save a file and reopen it

The glissando is neither persisted nor pasted.
I cannot attach msc file with it because well, it does not save. I have to recreate them every time I open a file. So, it's a data loss.

Gliss can be edited manually as a line, but after reloading a file it's reset to default position anyway, so it is not a workaround.