"Shake for New Story" bug

[emphar]

Load app.
Make sure "shake for new story" is turned on.
Load home page or story.
Sleep iOS device.
Shake device.
The app will detect the shake for a few additional seconds and continue to change news stories despite being in sleep mode.

Desired outcome: App should go inactive when the device goes into sleep mode and disable shake as soon as the sleep button is hit.