It’s probably intentional so people can’t LoS exploit.
They still have to have line of sight on you when they conduct their attack. All ranged attacks in this game, even the arrows somehow, are guided heat seeking missiles with your name on them. (Probably literally considering how coding works)
You'd have to dodge roll to break that lock, and when you combine the server being slightly behind on where exactly you're located it can seem like they have wall hacks.