https://techcrunch.com/2019/02/01/apple-facetime-privacy/

Three days after Apple pulled its new Group FaceTime feature offline after users found they could eavesdrop on people before accepting a call, the company says it’s fixed the bug on its end.

“We have fixed the Group FaceTime security bug on Apple’s servers and we will issue a software update to re-enable the feature for users next week,” said Apple in a statement. “We sincerely apologize to our customers who were affected and all who were concerned about this security issue. We appreciate everyone’s patience as we complete this process.”