Hand swipe to wake lock screen does work ! Well kind of

Hello everyone this is my first post here. :)

I just upgraded from a Moto X XT1060 to the newer Moto G 3rd Gen 1GB/8GB XT1540 two weeks ago, And found out that it does have a hand swipe to wake the Moto Display but it only works once every lock screen cycle. :(

I'm assuming this behavior is a bug, Can anyone else test this for me ?

1. Make sure Moto Display is on and let the screen go black, wait 2min.

2. Now swipe your hand over the screen about 1/4inch from the glass, Walla !! screen turns on ! woohoo ! lol

3. Now hand swipe again, Yep it doesn't work anymore....

4. Now unlock the screen to show your main home page etc.

5. Now wait and let the screen turn off again, Wait 2min and repeat hand swipe, Works again lol ! but again only works once.

Anyone else seeing this ?