You assumed correctly, once the system performs its scheduled inventory scan it will repopulate on the core. BTW, if a vulscan takes place on the client prior to the inventory scan it may error out, but will scan correctly the next time.
Thanks for the reply. What if I delete the managed device from inventory and take the machine off of the network. this would happen when replacing older PC's. Does the managed device get deleted from the database when I delete it from all devices via the console.