Completed Map Connected to Node but Map is still Unavailable

Bug Report ID: #3784141932

I completed the Seepage map in the image, attempting to progress towards the tower by way of the Rustbowl Node that is clearly connected to the map I just completed, but the map is still unavailable.

I do notice that there is another node connected to it with an uncompleted map, but in 93 (almost 94) levels of mapping, I don't remember ever needing to complete all adjacent nodes for a map to become available. As far as I recall, any completed node will activate a node connected to it.