Moved here from https://bugs.chromium.org/p/chromium/issues/detail?id=832004. If the cause is indeed Chromium then move discussion back there.

UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10323.67.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.209 Safari/537.36
Platform: 10323.67.0 (Official Build) stable-channel cave

Example URL:
Any URL

Steps to reproduce the problem:
1. Open any browser of any site you want
2. Wait for a few minutes so the chromebook will go to black
3. Make chromebook 'awake'
4. Browser will crash and the only thing you can do is shut down the chromebook by pressing the on/off button for a few seconds.

What is the expected behavior?
Chromebook becomes awake and you can work in your browser without crashing.

What went wrong?
The browser crashes and you can do nothing except turning the chromebook of.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? N/A 

Did this work before? Yes Before this update

Does this work in other browsers? N/A

Chrome version: 65.0.3325.209  Channel: stable
OS Version: 10323.67.0
Flash Version: 29.0.0.113