strange, i have done that quest several times with different chars and never had any bug, must be recent then, im gonna level one that i have to see if happens to me also...
i remember that it was related to bartholomo, that we had to finish his quests, then finish something else because of a gem or something, then talk with the crazy captain for him to travel and bury it, then talk to the girl to break, etc etc etc, i will report here if i get it bugged also or not