UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10176.68.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.144 Safari/537.36
Platform: Platform	10176.68.0 (Official Build) stable-channel link

Steps to reproduce the problem:
It's pretty random. But the device definitely dies after a one-day-sleep.

1. Start the device & open several pages normally.
2. Leave the device unattended for a while (one day, for instance).
3. Use power button or double tap touch pad.

What is the expected behavior?
The device resumes from sleeping.

What went wrong?
The device just dies. A force-restart (long-press power button) is required.

Did this work before? Yes 

Chrome version: 64.0.3282.144  Channel: stable
OS Version: 10176.68.0
Flash Version: 

I cannot remember the last known good version, maybe M62.