Users had begun discussing the bug on Reddit and Twitter prior to the outage. One commenter asked, “Has ChatGPT or me been hacked?” while another said of the exposed chat titles, “Good thing they don’t open.” What caused the bug in the open-source software that OpenAI uses is still unknown. By Monday night, the business claimed that ChatGPT was fully operational once more, though it added, “We’re continuing to work to restore past conversation history to users.”