Dark Souls III's Ashes of Ariandel DLC has not long been out, but if the patch notes for the latest DLC are anything to go by, there are a lot of bugs they need to fix.
The updates arrived on Friday and 1.09 looks to fix a long list of bugs, with most, but not all, applying to the DLC. PC, PS4, and Xbox One versions were all fixed, so hopefully these issues shouldn't be issues any more, especially one particularly annoying one "where the player can fall from any height by repeatedly performing the Crow Quills skill while the Silvercat Ring is equipped."
Did you have any issues with Ashes of Ariandel in terms of bugs?