Wilba loses sanity by equipping her silver necklace even though the transformation time has already passed. She keeps repeating the lines about the curse even if you're not wearing the necklace anymore. By equipping the necklace, you will lose sanity continuously. Unless you restart the game, and then stop.
Steps to Reproduce
Equip Wilba's necklace during the full moon, and even after the full moon is over, she will still lose sanity
Equip Wilba's necklace during the full moon, and even after the full moon is over, she will still lose sanity
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.