Apple is issuing a software update for the cold screen issue
https://m.imore.com/iphone-x-cold-weather
https://m.imore.com/iphone-x-cold-weather
We are aware of instances where the iPhone X screen will become temporarily unresponsive to touch after a rapid change to a cold environment," an Apple spokesperson told iMore. "After several seconds the screen will become fully responsive again. This will be addressed in an upcoming software update.