its always done this on pc, even on my old pc. Its does this whether I play wireless or wired. I cant try my ps4 controller right now since i lent it to a friend.
i'll try when i have a chance. But i'm pretty sure it has nothing to do with the controller since its been doing this ever since the controller was brand new, and it works perfectly fine in other games.

Somebody else posted about this problem on a separate forum and might've worded it better than I have:
http://ffxivrealm.com/threads/gamepa...-is-hard.5389/