This happened to me with a relatively new og Grasshopper once. I believe it stems from a manufacturing defect, but yes, aided slightly by some stickiness on the threads.
I doubt it takes much when this is 'ready' to happen.
Imo, I definitely would not attempt to re-install and use the thing.
[EDIT: I think the thin sliver of copper foil shown in your photo is the thread-locking 'device' and probably only good for a single use. I could be mistaken, mine all looked so shaky I didn't even try.]
It also reminds me of an og I had that would give me a shocking burn if I touched the front end and body at the same time (when powered 'on'). I assume bad connection with that 'brain capsule' part. In these devices the body carries current, there are no wires, as most of us here know.
@jabba, you've told us lots now about your own experience, it's all rosey in your world, etc., but sometimes it actually can be a problem with the device and not a fault of the user or the weed; that shouldn't be hard to understand.