Isn't the display supposed to stay off when it's in my pocket?

[eicca]

Isnt that a power-saving feature introduced in iOS 9? If the phone is face-down or in a pocket, the display isn't supposed to light up when getting a notification.

Mine still does. What gives?

 

[eicca]

Nobody else has a 6S, huh?

 

[Alrescha]

It is the refrigerator-door problem. If you are looking, you are probably causing the problem.

A.