Next time this happens try finding her exact spot using a thermometer. Go around looking for fluctuating temperatures. Once you notice that take a screenshot of the location and post it. I will be able to see if there's something in that spot that causes ghost to not move any where.
作者，我发现了一个新bug。有时，玛雅家卡帕的证据并不一致。信息明明写的是冰点温度，但鬼屋的温度却在7摄氏度左右。而且，地面上的激光点和文字似乎对鬼魂没有影响。如果鬼屋在一楼的浴室里……（kappa）
No, before Kupper even appeared, I had already placed two candles right next to her spawn point. The candles didn’t go out during the ghost hunt. I remember that in the previous version, candles would go out during a hunt.The conditions were just right for placing incense in the ghost room at that time.At that time, I hadn't used incense in the ghost room yet. I thought it might have been a bug, so I quit the game.