Users of the conversational AI platform ChatGPT discovered an interesting phenomenon over the weekend: the popular chatbot refuses to answer questions if asked about a “David Mayer.” Asking it to do so causes it to freeze up instantly.

In the most meta part of the response, ChatGPT concludes, "The exact cause of ChatGPT's difficulty with the name 'David Mayer' remains unclear, leading to various theories and discussions among users," citing Mashable's story, which first reported the issue, as the reason why the mystery is yet unsolved.

Users have been trying to get OpenAI's ChatGPT to acknowledge the name through a range of creative attempts, all to no avail.