there's a good chance that breakout was written before those issues of nightwing came out, which is why it's editorial's job to keep continuity and inform writers about what's going on in disparate books. the editorial at the big two's just been asleep at the wheel for years lol
He looks so happy back in Gotham you'd almost forget that a key talking point from Nightwing 138 was that he was in fact, unintentionally distancing himself from Babs, but who cares about continuity or respecting other writer's work?