Percy-Cypress v3 does not load fonts

We are trying to migrate one of our projects to the new Percy-Cypress v3, and we have problems with custom fonts not being rendered on the Percy screenshots.

Sample, with differences highlighted:

Sample, with no highlights:

From debug logs, I see that font files (woff and ttf) are being loaded -

[percy:core:discovery] Handling request for http://localhost:8080/fonts/CustomSansTTRegular.woff2 (42ms)
...
[percy:core:discovery] Handling request for http://localhost:8080/fonts/CustomSansTTRegular.woff2 (17ms)
...
[percy:core:discovery] Processing resource - http://localhost:8080/fonts/CustomSansTTRegular.woff2 (4ms)
[percy:core:discovery] Making local copy of response - http://localhost:8080/fonts/CustomSansTTRegular.woff2 (5ms)
[percy:core:discovery] -> url: http://localhost:8080/fonts/CustomSansTTRegular.woff2 (1ms)
[percy:core:discovery] -> sha: b0bacf06b2e7a3e3fc672625c9aaff825ed79d754a174c0f352d68d10daf7397 (0ms)
[percy:core:discovery] -> filepath: /tmp/percy/b0bacf06b2e7a3e3fc672625c9aaff825ed79d754a174c0f352d68d10daf7397 (1ms)
[percy:core:discovery] -> mimetype: font/woff2 (0ms)

...

(in the following tests)
[percy:core:discovery] Handling request for http://localhost:8080/fonts/CustomSansTTRegular.woff2 (1ms)
[percy:core:discovery] Response cache hit for http://localhost:8080/fonts/CustomSansTTRegular.woff2 (1ms)

All that looks pretty legit, besides the duplicate “handling request” line. Yet, the screenshots are rendered with the default font.

Any idea what went wrong here? Are we missing any pieces in the migration process?

[khitrenovich]

We were able to isolate the issue to a combination of webpack-dev-server and file-loader. Our solution was to use url-loader instead of the file-loader with webpack-dev-server - that is, locally and in PR builds in CI. You can add one more recipe to your collection of the workarounds. Thank you for helping us to solve this mystery!

[khitrenovich]

@Robdel12 Build 9750416, snapshot 549314950 (or any other from that build). Thank you so much!