I have had my Touchscreen for about 1 year and it had been fine on my RiPi2 with a 2015 version of Raspian.
I have just bought a RiPi3 and did a clean install of the very latest version of Raspian.
Downloaded 13/12/16 and 25/11/2016 version
Kernal 4.4.34 -V7 #930
Now at first everything seemed fine, touchscreen worked, woke up fine etc.
However if I let it sleep for a long time probably >30mins it refuses to wake up.
The only solution is to power off and on again - a sure way to corrupt the SD Card!
I read the forums and I see this is a known issue with later versions of Raspian BUT it is supposed to be fixed in the very latest version.
I have tried an apt-get update and apt-get upgrade
But the issue is still there.
I left it powered up, asleep and unresponsive for about 6 hours taping it intermittantly to see if it would “wake up” which it would not.
Suddenly after 7 hours it responded and “woke up”.