initiates with the precocious trait can't be sent on missions.
after the first potion is made the game refuses to let you make another and states you can only use one per day (this continues indefinitely
Edit: forgot to mention that the save carry over from faithbound 1 seems bugged as well. I married Yami, but faithbound 2 showed a natsuki marriage. This was not caused by viewing other marriages via the calendar in faithbound 1.