Snapchat don't turn off the screen on Note 4

Hello

This is my first post here but I hope it will resolve my problem I'm hawing with Snapchat.
Every time I use Snapchat on my Galaxy Note 4 and leave it untouched one would think the screen would turn off automatically after a while right ?
But no, screen stays on and wont turn off until I manually turn it off with the power button.

Anyone else experiencing this issue ? And does anyone have an idea why this is happening ?

Regards - Kristian

from Android Authority Forums http://ift.tt/2qzIPdW
via IFTTT