The latest update wouldn’t install properly because of the dunstify package. After some different unsuccessful approaches, I tried to remove dunstify with the intend of reinstalling it after the update was successful.
Therefore I removed dunstify (which also removed: dunst, update-notifier, gnome-shell-extension-manjaro-update).
Unfortunately I was only able to reinstall dunst. update-notifier needs dunstify as a dependancy and both the dunstify and gnome-shell-extension-manjaro-update package are not listed.
I also have now two “package manager” icons in the tray bar.
Manjaro Gnome 3.36.5