Default [Q] MOTO G Magnetic Flip cover problem

I have been trying various ROM's on my wife's Moto G. But none of them correctly sense the Motorola Flip cover. All ROM's turn on the phone ON when the cover is opened,but none turn the Moto G OFF when the cover is closed.

Can this be added to a "TODO" list, or is there a way that I can add this functionality back in myself?

I like some of the new ROM's but my wife loves the way the flip cover turns the phone on and off, so I'm back to stock for the time being.