on my icon i'm running the Developers preview. It seems when I hit the power button to wake my phone there is a slight delay. It seems to happen when i'm at home and not so much at work. Is there a common issue that i'm experiencing?
It is a bug with 8.1 and the Lumia Black firmware. It should (hopefully) be fixed with the Lumia Cyan/Denim firmware update, whenever they are released.