Rogue One shatters that. At the end of the movie, we see Vader rip apart a bunch of rebels who are getting information to Leia. It ends minutes before A New Hope begins. Vader then shows up on Leias ship and immediately starts ripping into her. Whether Vader knew about her prior to this encounter, it shouldn't matter. She is now a known ally of the Rebellion. He's been known to squeeze information out of anyone with no hesitation, being able to sense their intent from miles away, but she completely bluffs him? This young woman who he knows is a rebel? He's the leader of the Inquisitors. His whole deal is finding people who are force sensitive and then either killing or turning them. He's been training people for years, able to sense levels of force sensitivity in them that the person isn't even aware of.

People complain about NuTrek breaking established canon but there's literally no example of it. Meanwhile Star Wars has written itself into such an extreme corner that their movies no longer make sense.