I keep having the same problem on xbox as well. It seems to be connected to thralls on workstations. My fighters don’t disappear, however, several thralls tied to work stations have vanished. I can see them on my follower list, yet when tracking they can’t be found. Upon “rescuing” them, the game says that it can’t locate the thrall and it eats them. They are removed from the thrall list as though they disappeared into the aether. The problem is not exclusive to PlayStation as I’m on Xbox series X and it’s a persisting problem.

I suspect the thralls are spawning in before the world does and end up falling through. Something to do with the render order. Not 100% sure though. Just an educated guess. I’m going to go taming more thralls tonight and I’m planning on disabling thrall use on work stations before i log off in hopes of preventing further losses. If it doesn’t work then I’ll update this post accordingly.