In iOS 10, on the lock screen (or in the notification center), swiping up on a notification does nothing and to dismiss a notification you have to swipe left and tap "Clear".
On the other hand, when the phone is unlocked and you get a notification, swiping left does nothing and you have to swipe up to dismiss it.
I understand why swiping up isn't a valid gesture for the lock screen, because it would conflict with vertical scrolling when there are multiple notifications.
But I'm baffled why "swipe left" wasn't used as a universal gesture to clear a notification. Apple is usually good about design consistency, so I assume I must be missing some advantage of this design.
Is there a usability advantage to the current implementation where the most common operation with notifications (dismissing them!) requires a different swipe direction depending on whether the phone is locked or unlocked? If so, what is the advantage?