[Bug: Browser Extension] Some of my site's fonts are blocked by extension until I refresh page

[ghost]

Since using Webhint, I've discovered a weird bug that I thought was a Chromium issue, but I've been able to demonstrate that it's the Webhint extension that's causing the problem.

If the Webhint extension is active, then when I first load my page, there's a delay between the time that the default/fall-back sans-serif fonts are displayed and when the specified, "first-choice" webfonts are used, in this case, Cabin. No real problem there, although it would be nice if there wasn't a delay.

Here's the real problem, though:

After the Cabin fonts are fully loaded on the site, only the bold, italic, and other non-regular fonts are employed. The site continues to use the fallback, generic sans-serif fonts.

If I then refresh the page, however, the regular fonts convert to the specified "Cabin" font.

The site in question is https://thomasbrodhead.com

I'm on Windows 8.1, using the current Chrome (77)

Here are screen shots that illustrate the problem:

https://bmt-systems.com/tmb-01-annotated.jpg

https://bmt-systems.com/tmb-02-annotated.jpg

https://bmt-systems.com/tmb-03-annotated.jpg

I've set the Webhint browser extension to be active in Incognito mode, btw.

[molant]

Does this issue happen with just the extension installed or when you run an analysis with it?

[ghost]

This doesn't happen during analysis, because the browser refreshes during that process.

This also doesn't happen if Chrome is already open in any other form. A single instance of Chrome is what is needed to reproduce the behavior.

With all instances of Chrome closed, open Chrome directly in an incognito window by issuing this command at a CMD prompt:

"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" -incognito "https://thomasbrodhead.com"

On my Windows 8.1 machine, the described buggy behavior obtains. On the other hand, if a regular instance of Chrome is already open, opening the incognito window using the method described will not reproduce the buggy behavior.