Grips look like they remain stolen because they don't lose their Identity on combination. Guards however. do.
Stolen Guard + Stolen Grip -> Dismantle -> Guard + Stolen Grip
Stolen Guard + Grip -> Dismantle -> Guard + Grip
Guard + Stolen Grip -> Dismantle -. Guard + stolen grip
Sword + Stolen Guard + Stolen Grip -> dismantle -> sword, guard, stolen grip
So if there's a way to make the grip momentarily forget itself, It would likely clear the status, but otherwise, grips = hard to steal - everything else = easy peasy basically forgets regardless. - i.e I'm not even sure it remembers its stolen even if you don't dismantle it - since you can't even see "Stolen" before dismantling, because you only see the grip, and the grip wasn't stolen.