I use double tap to wake all day everyday and noticed it just stops working the screen doesn't wake. I thought maybe I am double tapping to slow or fast but tried every combination. What I noticed if I put my hand over the top sensors then release it starts working again. This to me means the proximity sensor is faulty but the AOD is still on. I contacted Google and they sent me a new replacement phone. On the new phone I did a brand new setup not a restore it worked fine for a few days and now it has started again. Double tap to wake just stops working. Any one else experience this?