A logic issue was addressed with improved restrictions. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2. A sandboxed process may be able to circumvent sandbox restrictions.
https://support.apple.com/kb/HT211103
https://support.apple.com/kb/HT211102