If your phone starts listening BEFORE you answer, will that be considered a BUG or Feature (AI may be). Apparently, FaceTime has this problem and Apple is scrambling to fix this embarrassingly dangerous “snooping” bug in FaceTime app.

The bug goes like this:

1. Call someone from your contacts using FaceTime.
2. Their phone will ring.
3. Use the “Add Person” option to include a new participant in the chat, namely yourself. 

…and you can immediately hear the audio feed from the person who hasn’t answered the call yet.

https://nakedsecurity.sophos.com/2019/01/29/apple-facetime-eavesdropping-bug/