Recently Debian 8 was updated and maybe a coincidence or not but the files that I had (Impress) that had math equations, now, when I edit or add new ones they are not visible anymore.
To make them visible I have to copy the equation to a new presentation and copy back to the original file.
Does someone have the same issue? Version 188.8.131.52 under Gnome 3 Debian 8
All the best