I have my own personal base at the red rocket stop. There are no settlers present except dogmeat because I store all my personal stuff there.

So ever since patch 1.03, I've had quite a few times where the weapon's workbench is magically running on its own accord complete with the sound, like it does when you're working on it. Except that I'm standing a few feet away, dumbfounded, and watching the handles spinning and the wheel rotating on their own. This has also happened with the cooking spit with the handle and spit turning on its own over the fire.

I've no plausible explanation for these phenomenon. I think I might have to try the ghostbusters....

Did you clear out the cave below red rocket? Could be some sneaky camouflaged chameleonized molerats gearing up for an all out war.

I have a weapons workbench that does that in a another location!