Iphone x glitch
I've noticed a glitch on iOS 11.2.6,
with the iphone x locked, take a snapshot (using power button and vol up)
then once taken open the snapshot without unlocking the iphone, click on done and delete picture.
once deleted the iphone will freeze on the lock screen not allowing you to unlock the phone unless you hold power up and vol up to power down and then click cancel.
iPhone X, iOS 11.2.6