Title, pretty much. At first I thought it might've been the dreaded "CTD when shooting guns anywhere" bug, but after loading an earlier save, as well as traveling to other places around the map, I've pinned it down to the inside of lighthouse only. Basically, if I shoot any bullet-firing gun when inside(or at the top of) of the lighthouse and it hits something that isn't air my game crashes. No idea why, since my modlist is still the same as a few months ago, and also I never turned on weapon debris.