A logic issue was addressed with improved restrictions. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, tvOS 15.1, watchOS 8.1, macOS Monterey 12.0.1. A malicious application may be able to access information about a user's contacts.
https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective
https://support.apple.com/kb/HT212979
https://support.apple.com/kb/HT212867
https://support.apple.com/en-us/HT212876
https://support.apple.com/en-us/HT212874