Apple has fessed up to a bug introduced in iOS 15 that, for some iPhone users, was not respecting their wishes to opt out of sharing voice recordings to strengthen Siri, the built-in digital assistant. Fortunately this privacy bug was stomped out with the release of iOS 15.2, so be sure your iPhone is updated (the current non-beta release

Source: Hot Hardware – Apple iOS 15 Bug Shared iPhone Recordings With Siri After Opting Out In Privacy Fail