Why can't I dismiss lock screen notifications?

[AC Question]

When I set lock screen notifications to hide sensitive notification content, I am unable to swipe the notifications away on the lock screen. I have to unlock the phone and dismiss them.

When I show all notification content, I am able to swipe all notifications away on the lock screen.

I would like to be able to dismiss all notifications on the lock screen, whether or not I'm showing sensitive information.

Wileyfox Swift / Android 6.0.1 / Cynaogen 13.1.2

Any ideas? Thanks.