So I intermittently get this issue. Faceid Shute down. I either get the passcode required message or just a faceid failure and entering the passcode does not reeneble faceid, only a restart gets it to work again. Discussed with Apple, they were going to send out an express replacement and then I found out that service is $99. I’ve had this done before but do not remember a fee being attached, especially for a hardware error and not an accident on my part. Anybody else run into this? Not sure if it’s worth the argument but the issue is becoming slowly more prevalent with my phone.