"new or updated topic" banner appearing

AI-generated summary

Beckfield reports that since late September, a “new or updated topic” banner has been appearing constantly on their Discourse forum (Plex), even though new messages are in unmuted categories and should trigger category counters instead. Clicking the banner clears it, and navigating to “Latest” confirms new posts exist—but they don’t appear as unread indicators beside category titles. The issue also appears on other Discourse forums like Duplicati and Postman, despite no muted categories there. Beckfield finds this behavior distracting and asks if it’s a known bug.

As of sometime in late September, I’m seeing this banner appearing all the time:

When the banner appears, there apparently are some new messages, but for some reason they don’t trigger a number next to the appropriate forum category (some do, some don’t. It’s weird). If I click on the banner, it just clears the banner. If I click on ‘Latest,’ it shows me the Latest list, and there are indeed new messages there. But they are in forum sections that aren’t muted or hidden, so why are they triggering the banner, rather than a count number next to the section title?

I have accounts on 6 other Discourse-powered forums. I’ve seen the same thing on a couple of them (Duplicati and Postman). None of them are as active as Plex, so I may just not have given them enough time. There are no muted categories on those pages. I have muted categories on Plex, but, as I said, this is happening for messages in unmuted categories.

Is this a known problem? It’s very distracting.

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