The issue was addressed with improved validation on the FaceTime server. This issue is fixed in macOS Mojave 10.14.3 Supplemental Update, iOS 12.1.4. A thorough security audit of the FaceTime service uncovered an issue with Live Photos .Referenceshttps://support.apple.com/en-us/HT209520https://support.apple.com/en-us/HT209521
