I don't know if this is a bug or not so I might as well post it to make sure.
On JP, there is a title for using ANY QUEST TRIGGER under the quests section of titles. But everyone that I've spoken to that's used a trigger for something in the past says they don't have it on NA. I have used multiple VR Vegas triggers but nothing.
I don't know if it's because we're in early content where I don't think triggers existed before, and thus the title isn't achievable until later, or if it's supposed to be possible to get this title but it's not working, or certain triggers aren't making it work, or something else.
If anyone has it, it's probably under a "Quest Triggers" section in your Quest titles. I'd love to know if someone has it because then that narrows down the issue to certain triggers not giving the title, and not something like "the title is purposely unachievable right now and not bugged" which is the current assumption -- as we aren't really supposed to have triggers at this point as far as I know.
The title name is 大敵に挑む者 on JP with a 10 Star Gem reward.