UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.146 Safari/537.36

Steps to reproduce the problem:
1. Open any site on the latest Chrome 65
2. Open Inspect Menu 
3. Toggle Responsive Mode
4. Change to any device from the list

What is the expected behavior?
Page should show the emulation in the screen size of the chosen device.

What went wrong?
Page is distorted, usually showing something like the top left 10% of the screen only.

Did this work before? Yes 64

Chrome version: 65.0.3325.146  Channel: stable
OS Version: OS X 10.12.6
Flash Version: 

Current workaround seems to be chose the device you want to emulate, when it glitches, close the tab and restore it. Open inspect again and it should be fine unless you adjust to a new device, in which case you need to repeat this step.