New Issue After logging in, messages and notifications do not immediately work

A new issue that has not yet been assigned a status
Hi Charlie.

Some of the mods have noticed that, for some of them, on some browsers, the notification bell "flashes" red only for a moment. Is this what you are seeing?

We just updated to the very latest version of XF, though I doubt it will fix this particular issue. I don't experience it, and neither do some of the other mods. If you can find any rhyme or reason, a pattern, a specific browser, etc, let me know.
 
Since the upgrade I have observed the following behavior:
Each time I log in there are no messages or notifications shown.
As soon as I load a new page/thread or click refresh in my browser there are new messages or notifications shown.

I've been seeing this same exact behavior. I'm on Windows 11 + Firefox 131.0.3

My workaround is to click "Watched" --> "Watched threads (all)" and suddenly the notification bell springs up a red count of unread posts.
 
Here are screenshots of what I see:
notifications not working.png
 
The common thread so far, for this and a number of other weird issues, seems to be FireFox. Or it might be that FireFox users, being more think-outside-the-box/default types, are more likely to bother to report issues. Can you try in another browser and see if you have the same issue? This will help narrow it down.