I have an almost-identical issue, but in my case it's all the secrets on both the Cyseal and Forest maps have suddenly vanished.

"But I don't want to go among mad people."
"Oh, you can't help that. We're all mad here. I'm mad. You're mad."
"How do you know I'm mad?"
"You must be, or you wouldn't have come here."

Public Key ID: 057420A1