Preview cookies not passed for sequenced redirects

[pex]

Bug report

Describe the bug

When redirecting from a third party application to a next app that uses setPreviewData to set preview cookies to then itself redirect to a page that wants to consume preview data in getStaticProps, no cookie will be attached to the request and therefore previewData will be empty.

A common case is a headless CMS that redirects an editor to a preview endpoint in order to review changes.

To Reproduce

Use an affected browser (Safari or Firefox) and

0. Open private window or clear cookies
1. Visit https://next-preview-mode-redirect.now.sh/api/redirect
2. You get redirected to https://next-preview-mode.now.sh/api/preview and setPreviewData
3. You get redirected to https://next-preview-mode.now.sh/test with no cookie headers set!

Source Code:

1. Preview Mode App: https://zeit.co/pex/next-preview-mode/7dtqcyof8/source
2. Simple Redirect App: https://zeit.co/pex/next-preview-mode-redirect/o34d2dx4h/source

Expected behavior

The final page in the redirect chain should always render Preview mode is On when comming from https://next-preview-mode.now.sh/api/preview regardless of the referrer or browser. Therefore the preview cookies always need to be passed in request headers.

Beeing redirect should just work as accessing https://next-preview-mode.now.sh/api/preview directly.

System information

• OS: macOS, Windows
• Browsers: Firefox, Safari
• Version of Next.js: 9.3.1

Additional context

Chrome, Edge and Internet Explorer work as expected.

This issue was extracted from my monologue in #11298.

[timneutkens]

#11495 potentially solves your issue

[pex]

It does solve the issue @timneutkens . Many thanks 🙏

[balazsorban44]

This issue has been automatically locked due to no recent activity. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.