So, I was in the middle of doing some quests in Begus when I decided to go back to the thief hideout, opening the menu I noticed I had only Ryen on my party, strange, so I tried going to the hideout with the item, but it said I couldn't use it at the time. I went there on foot, thinking it was something of the quest, a part of it. I completed it, then couldn't leave the hideout, the same message was shown for any teleporting item. I saved, left, and came back, then the items worked... But I was still only by myself. I searched for an event that had the party away and then back, finding the bath house, and thought it was all nice... Until some minutes later when I noticed Sandra was missing. Nothing I've done so far can get her back, I still have affection with her, the place where we first find her is still completed, I just have no idea. I don't use her in my fighting much, but it's still annoing and saddening that she just disappeared.