The semantic data is loaded from the game when the page it is on is reloaded/viewed. The list pages do not trigger a refresh. So if region A is conquered, the wiki will be out of date until someone visits the region page.
Merely displaying the page doesn't refresh the semantic data associated with the page. You have to actually trigger an edit/save, or flush the page render cache.
Viewing a page with an expired cache will trigger a refresh of the semantic query. But if the semantic data on the queried pages is out of date, then the results of the semantic query will still return old data.
Well, basically. There's a bit more going on.
Yep, I recall that it took us a while to find out how this works. Turns out that it's a known deficiency of using the combination of external data and semantic data.
But it's important for people to know that merely
viewing a page will not refresh semantic data that is derived from the external data feed. The region box info will *look* correct on the page, but the semantic data stored for the page will not be updated without an edit/save action.