I upgraded to Lubuntu 20.04 (from 19.10). Now I see two icons for software updates in panel.
The tooltip for both is "Benachichtigungsdienst für Aktualisierungen" (German language version).
Right-clicking on the second one just shows one menu item "Livepatch-Einstellungen" which leads me to the Livepatch-Tab of "Apps and Updates" (Livepatch is not availiable on my machine).
The first one shows a bigger menu, e.g. to open the same window "Apps and Updates" or to show availiable updates.
Both icons disappear by killing the "update-notifier"-task.
In 19.10 the updater showed me – when there were updates availiable – a detailed window like this:
Now I just see a small notification ("update-notifier") that there are some updates with "upgrade" and "close" buttons. On upgrade it starts /usr/bin/lubuntu-upgrader --full-upgrade.
Only sometimes I see the first mentioned old and much more detailed window.
Why are there two different ways to tell me about updates?
Why are there two icons by the same app?
How can I always get the window with the detailed update information again?