In a statement to Yahoo’s David Pogue, Apple explains what happened:
“People were handling the device for stage demo ahead of time,†says a rep, “and didn’t realize Face ID was trying to authenticate their face. After failing a number of times, because they weren’t Craig, the iPhone did what it was designed to do, which was to require his passcode.†In other words, “Face ID worked as it was designed to.â€
It’s pretty unfortunate that this happened during the world debut of the feature. Take a look at a clip of the moment below!