I've had this issue. Mainly if my phone sits for a while, the swipe up to unlock doesn't work, it doesn't respond to any touch, then I sleep/wake the screen again and it works fine.
I also feel like I've noticed that swiping back and fourth between pages where you start from the edge is unreliable, and I have to try to it 2-3 times every once in a while.
I also feel like I've noticed that swiping back and fourth between pages where you start from the edge is unreliable, and I have to try to it 2-3 times every once in a while.