UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36

Steps to reproduce the problem:
1. Start Chrome with the --auto-open-devtools-for-tabs flag.
2. Navigate to a page, e.g. google.com
3. Duplicate the tab.

What is the expected behavior?
The DevTools instance opened for the new tab should record all the network requests made.

What went wrong?
The DevTools instance misses network requests made early on.

Did this work before? N/A 

Chrome version: 63.0.3239.84  Channel: n/a
OS Version: OS X 10.13.2
Flash Version: