the one with the fire is simply that it goes out when you load the game - same with the doors. Nothing really breaks here, it's just that the lit (for doors the open) state isn't saved and therefore doesn't get loaded once you load a saved state. That's all.
The thing that does break (again in the sence of resetting a variable) is the timeoput for a dragon egg in front of that fire.
The bug with the default textured slots felt like a loading bug as well. As if the items weren't in the cache anymore and had to be loaded in from the save file once more. Replacing the bugged / unloaded slots with a not bugged item apparently did the trick by triggering that loading mechanic.