I'll bet it's a random event that's firing, looking for something specific, not finding it and crashing the game. Could you post the savegame somewhere so I can take a look?
I might be able to either fix the save, or give you a solution.
I might be able to either fix the save, or give you a solution.
I only stumbled into this bug a few weeks ago, and I haven't really had the time to dig into it.