Pinned topics and categories

It one of the recent topics, I wanted to link to this topic, remembering that it is pinned. And it is pinned, indeed, but only in the "meta" category: when I choose "all categories", it is not shown as pinned. Is this the normal behaviour of Discourse?

For me it disappeared once I had marked it as read. It is still on the front page if I open an incognito tab.