Sorry in advance if someone else has already posted about this, but I seem to be encountering a problem in which my notifications are several days out of sync with this site's history. I'm getting notifications for events that happened several days ago and this was after a long period where I wasn't getting notifications at all.
I decided to wait for a few days so that I could see if this was a recurring pattern and decided to screenshot an example. The two images below this message were taken as I was writing it and both were taken immediately after I refreshed their respective pages. As you can see, I've just received a notification for something that happened 6 days ago.
I have no idea what is causing this but it might be the result of an attempt to fix a previous issue with the notifications (in which I and several other users were getting duplicate notifications for the same thing) as I am no longer encountering that issue.
I have been experiencing similar issues for users that I'm following. I haven't received forum reply or new scene notifications for the past week or so despite some of the people I'm following posting content. Not sure what's going on, but I'm assuming its related to the dup notification bug from the last few weeks.