Comment 7 for bug 1913672

Maybe old bug reports are incorrectly attached to newer packages.

Focal, Bionic and others also have "zombie updates" : update-notifier on Focal, gnome-calculator and nautilus on Bionic. Those last two have been zombified more than one year ago (moreover at the same time it seems). Have a look here : https://people.canonical.com/~ubuntu-archive/phased-updates.html

Considering all those first go through proposed, the phasing system is an ultimate security system in case something slipped through, which should happen rarely.