In my case (see comment #4 above) it turned out that the lack of menu was caused by unnecessary presence of indicator-applet-appmenu in my GNOME panel. After removing the applet from panel, the menu was back.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreoffice in Ubuntu. https://bugs.launchpad.net/bugs/1863282 Title: libreoffice menu bar disappeared Status in libreoffice package in Ubuntu: Confirmed Bug description: Last kde neon 18.04 update Libreoffice menu bar disappeared. Uninstall libreoffice-kde & libreoffice-kde4 resolve problem, but need to install libreoffice-gtk3. KDE neon User Edition 5.18 18.04 libreoffice-kde 1:6.0.7-0ubuntu0.18.04.10 libreoffice-kde4 1:6.0.7-0ubuntu0.18.04.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1863282/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp