My guess is the invisibility cheat.
If there is a repeatable way to test this, then please do.
I probably won't be removing or changing the invisibility cheat, but we can at least put in the instructions to turn it off for certain situations (or if there is another cheat doing this).
the best way would be to save, then load the save use a specific option until the end of the event, and see if that one option caused the problem.
we have no way to undo this. I suggest using the gem option we added to allow placing of whatever gem you like
Yeah I can confirm it is the invincibility cheat will bug out at the fortress. Also, in some story missions if you have it on you get a game over after the cut scene instead of progressing. You just have to be careful when you use the invincibility.
I went back and was able to replicate this. Do not use invincibility in your main fortress takes. It listed me as dead at the end and then my point of view froze after.