As a pilot, if I see a notam "that caused restricted … notices to be issued"-- especially in a military context-- I would be very comfortable describing the affected airspace as "shut down". I'm probably missing something as your link to an apparently low quality story is also paywalled. Maybe they're referring to the fact that the military almost always exempts itself from its TFRs, so technically it wasn't completely "shut down", but by that definition no airspace is ever shut down.