VULNERABILITY DETAILS
Please provide a brief explanation of the security issue.

VERSION
Version 60.0.3112.101 (Official Build) (64-bit)
Operating System: Windows 10

REPRODUCTION CASE
In some cases, (my case being one of them) the content security policy will be an old version. This was tested by going to twitter.com and inspecting the headers on one computer, and on another computer with the exact same version the headers were different. These page loads were within 2 seconds of each-other. Subsequent refreshes showed that they still remained different, even after clearing the caches from the beginning of time.

The computers were the exact same model number, browser version, operating system version and updates, and on the same internet connection.

I don't have to mention the important nature of updating security policies.

If you can't reproduce on your side let me know and I will put more effort into finding a way to reproduce this. I think it's a rare occurrence, and it would only happen in-between chrome updates since it must flush these caches out during relaunches.

I just had a thought, that maybe the cache persists while the browser hasn't been relaunched. Personally I put my computer to sleep at night, the other computer gets fully shut down. This is the only difference. I will try to use that to investigate.