OpenAI, the owner of ChatGPT, said on Wednesday it had fixed a bug that caused a “significant issue” where a small number of users could see the headers of others’ chat histories using a viral chatbot, Reuters reported.

As a result of the fix, users will not be able to access their chat history for certain hours, CEO Sam Altman said on Twitter.

Since launching late last year, ChatGPT has grown exponentially as people around the world get creative with the suggestions the conversational chatbot uses to create everything from poems and novels to jokes and screenplays.

Last week, Microsoft Corp-backed OpenAI released its GPT-4 artificial intelligence model, an update to GPT-3.5, which became available to users via ChatGPT on November 30.

According to analytics firm Similarweb, the integration of OpenAI’s GPT technology into Microsoft’s Bing has attracted people to the little-used search engine.