Apple rolled out the Communication Limits feature in iOS 13.3 on Tuesday with a bug that allows kids to bypass parental controls that prevent them from talking to anyone that is not in the iPhone’s address book. CNBC found that adding to the address book an unknown number that texted the mobile device is still possible, allowing voice, FaceTime, or text message exchange. Apple said that it’s working on a complete fix that would be available in the upcoming software update. Until then, users that want to use the feature can use the Downtime feature that allows restricting access to apps according to a defined schedule.
Source: https://www.bleepingcomputer.com/news/apple/apple-to-fix-bug-that-bypasses-communication-controls-for-kids/