A bug in iOS 15 recorded iPhone users who previously opted out of Apple’s Siri improvement efforts, ZDNet reports. Users were presented with the option to help Apple improve Siri by allowing Apple to review their voice interactions with the feature. Once the bug was discovered, Apple turned off the collection feature for iOS 15.2 and deleted recordings. The iOS 15.4 update will still ask users to opt in or out to the Siri improvement feature after the bug was fixed.