Hey there, My dads Apple Watch Sport just arrived today; however, it's not going to sleep when the arm is lowered or waking up when the arm is brought in front of your face. My Watch is extremely responsive when waking and sleeping, but my dads new watch doesn't respond at all to arm movements. The "Wake on Raise Wrist" option is turned on. I've tried unpairing and repairing several times. Is this a hardware defect? I've got a Genius appointment tomorrow but I want to make sure this is a hardware defect. Has anyone else had this problem? Thanks!