Hello and good day.
It seems with many of the tests I run I see a request with a 404 error at the bottom of the waterfall. The error request is: asset-manifest.json
I have seen this same 404 error on tests with my website and on Google.com, Vimeo.com and others so I assume it might be a bug with WEBPAGETEST.com.
Here is one test for google: WebPageTest - Running web page performance and optimization tests...
Please let me know what you think.
Thank you and have an amazing day.