However, in Firefox I received the Gnome desktop notification that there was an update pending. The update did not occur. This can not be correct behaviour.
(is the bug that the notification is sent because the snap refresh detected a new version, but the pre-download failed because of a phased updates delay? So that is why it works sometimes … when randomly you are in the early part of the phased rollout, it works? That is pretty funny, and not a very good user experience!)
EDIT: I see from above that you already ruled out such a sync error (where the notification is based on one trigger and the pre-download on another). That’s too bad, because it fits what happens. However, just to be crystal clear, I received a desktop notification that there was a snap firefox update, so that definitely happened. The snap changes before I exited firefox is not specific about which updates it downloaded, it just says " ``` “Pre-download tasks for auto-refresh”. Based on your comments above, you rule out that it has pre-downloaded firefox because the firefox update did not happen. But for sure, I got the pending update notification referring to firefox.