Chat name from unknown context in unknown language

Android app (up to date):

I created new chat with GPT 4 just to check if server is up again. I asked what day follows yesterday and chatGPT answered correctly. But then I noticed weird chat name. There was “Resumo e título: Requisição do usuário”. It is not my native language so I added this phrase to translator and it seems like real user’s request for suggestion in Portugese. How could possibly this appear on my account? It looks like user session leak to me. Or atleast a bug coincidence.