Repro: Vercel `rewrites` and Next.js `i18n` issue

We use Vercel rewrites quite a lot in our project.

We also have a Next.js site in our Vercel project.

Since we've activated the Next.js i18n feature, our Vercel rewrites are broken.

module.exports = {
  target: 'serverless',
+  i18n: {
+    locales: ['en', 'de'],
+    defaultLocale: 'en',
+  },
}

Try it

It consists of a Next.js and a /function.js build.

It also adds a rewrite from /rewritten to /function.js.

A call to /rewritten leads to 404 Not Found.

We'd expect it to return It works! from /function.js.