Peter Doocy said they were getting early reports that a staffer who was supposed to be in the chat had the Atlantic editor's number saved as one of their secondary numbers, i.e., work-home-cell phone fields.

So this seems deliberate if that reporting is true. There are still a lot of people, from Deep Staters, never Trumpers, and TDS sufferers who wish to derail Trump and his agenda within the government, so it would track.