Apple secretly recorded, stored and reviewed user interactions with the official voice assistant Siri.
According to ZDNet.
iOS 15 has a bug that causes the Siri and Dictation Enhancements feature to enabled even for those users who previously disabled it in the settings.
For some time, records of conversations with Siri were secretly collected, while users remained in the dark. How many people became victims of the situation, the company chose not to voice.