I exited the South map, went to the West map and rested until healed. When I went back into the South, I walked into this immediately: This should be the save immediately beforehand. And it is repeatable. Every time I load that game and go south, this happens
It was a bug after all Added to bug list. Had you already removed the Ark? Because I don't see it there. Definitely a bug if it doesn't spawn.
That's another interesting thing. It was there, I saved the game, and then I walked around the empty room a bit and I took it. Then I reloaded, so it should have been there but it wasn't there. I was able to hover my mouse over the area and the little pop-up description appeared, so I wasn't much concerned. It was at that point I took that screenshot that you see in my post. But I found the trigger for the baddie spawned, killed them and grabbed the ark and have moved on. unfortunately I just tried to recreate the issue but the ark always reappears on reload
The Ark is statically placed along with map. So it should always be there. Perhaps some internal engine error caused it. It is not critical I would think. The missing promter trigger when walking from north door is bug obviously. I actually forgot about it. Thanks again @FDR4PREZ for finding it !