Map gen made a boss room that is disconnected from the main map

The map generator made a map where the boss room isn't connected to the rest of the map. You can see the passage, but on the minimap, you can see that there's impassable terrain. I could jump across the gap using pounce, but couldn't walk over (there was an invisible wall). Bug Report ID: #3313049072

Here's a screenshot: https://imgur.com/a/12vH6bw