If you added the mod after you visited that chunk, the map mod will not work. For the maps to work on a walkthrough already created, you need to have that area unexplored. I will test if the map works on the latest version of PZ when I have time, but it should work fine since I haven't changed anything since the last update.

I just tested the mod on a new savegame (along with my 209 mods that I use for my playthru), and the map works just fine. I hope you can figure out what the issue is, maybe what I said or maybe another map mod that messes up with something. I posted an image here so you can see I tested it, and I'm not blabbering. https://imgur.com/a/Yt4ayQN