Edits to the "About the *** category" topic don't appear in latest

Ok, I know there are lots of topics about edits to wikis and how they interact with topic bumps, but this seems a different.

We’ve made our “about the category” pinned category description topics wikis. Nearly all of these have no subsequent posts (or possibly only hidden/deleted ones), so edits to them should indeed bump the topic. And yet edits to them don’t appear on any “latest” views except for their own specific category view. In their own categories, yes, they do bump the topic and appear at the top of the list.

Is this intended? Can I turn this behavior off?