Inconsistency in Bran's Character
The show took a lot of air time this season to establish that Bran is no longer Bran, "not really though." The scene with Meera was painful to watch, but it seemed purposeful to establish Bran's full transition. The scene with Sansa by the tree showed he lost the ability to be sensitive even with his own family.
But now Bran is acting human again by helping his sisters bring down LF, and by being concerned that Jon know his true identity. Maybe you could say that he sees these things as essential to the bigger picture, but I think both were done out of concern for the people involved. He was nicer to Sam for helping him across the wall years ago than he was to Meera for saving him and dragging him around.
It reminds me of the movie The Transporter; the story takes a lot of time establishing that "this guy has rules" but then he immediately breaks those rules by accepting a impromptu assignment and then checking what's in the package. Why even bother with all of the setup then? As story telling goes, when you remind someone of "The Transporter," you've probably done something wrong.