The incident, which has been under investigation by the bank, is believed to have occurred due to a technical issue within the PIX system. The exposed data included key information such as account numbers, transaction details, and personal data of account holders. The bank has stated that it is taking the matter seriously and has implemented measures to mitigate the potential risks associated with the exposure. Customers who may have been affected by the incident are being notified and advised to take appropriate precautions to protect their accounts.