AFAIK, there's no indication that it was anything more than stress-related at first. And Léopold II had no interest in her regaining her sanity, since while she was "unfit" he had charge of the inheritance her father had left her (which was quite sizeable IIRC, and part of the reason Léopold decided to leave his daughters zilch). Considering that she was still deemed sane before the interview wherein she begged Napoléon III to help Max (but he refused), and then went to Rome where she is the first official woman to have spent the night in the papal apartments, and the symptoms only started presenting there (persecution mania, for instance), causing the pope to drily remark "the papacy has never had a woman spend the night in the Vatican, its has likewise never had a woman go mad here", my layman's opinion is that she should be fine. Maybe jittery and nervous later on (Stéphanie and Louise (her nieces) both mentioned this), but her doctors later had only to remind her in one of her fits "Majesty, your behaviour is not seemly in an empress" to get her to stop. Also, she'd damage anything of Max's in said episodes.