That got memory holed almost immediately. They let Skip Bayless's tweet take the forefront and moved on.
That's fair play if it happened.
I believe the on-site guy said that the comment was nonsense, he was in touch with Goodell and the refs, and no one said to warm up and play.
NFL official says league didn’t try to resume MNF game
I'm too cynical to believe this is true, but absent any other compelling evidence I have to go with this post.
As an aside, Skip Bayless is kind of a douche, but a "broken clock" and all...