Map device doesn't allow traversing to connected map (#2,299,653,531)

Maneuvering through the Atlas can be a pain... And especially so when it just flat-out doesn't obey its own rules.

I've encountered a spot where I completed a map, and only three of the four adjacent (and incomplete) maps became available. A fourth map remains grayed-out, and cannot be run.

Bug Report ID: #2299653531. Report likely doesn't help, so this is chiefly included to ward off bad-faith commenters.

Reproduction: I can't think of much in terms of what factors may make this reproducible, but it is worth noting that yes, this particular segment crosses the boundary between two "chunks" of the Atlas. This can be identified by the strip of "uncorrupted" land running from northwest-to-southeast that separates some of these nodes.

Screenshot: Attached is a pair of screenshots that demonstrates this behavior. As you can see, a Sulphuric Caverns was the most-recently run map, and is cleared as indicated by a green marker. (as opposed to yellow) to the left are 3 linked maps that are highlighted in blue, indicating that they are available... But the Fortress to the upper-right (with boss) has a gray icon.

There are two screenshots attached: the first has the bug report number, and is more zoomed-out, while the second is zoomed-in to give a better view of the dotted line indicating a link.