Cover image not displaying, showing map image instead

In my Isle of Unase world, my main area (of the isle itself), this one…

…has both a Cover image and a map image as shown here:

But when I click on that area in the map, the Cover image isn’t showing. Instead, it shows the map image:

This test campaign:

https://play.fables.gg/0193e174-55e2-7ac4-89b5-b8d92f98d060/play