This is a minimum reproduction of a routing/localizaton issue with middleware.js. It was made with create-next-app.

If skipMiddlewareUrlNormalize in next.config.js is set to true, the value of nextUrl.locale in middlware.js is inaccurate while doing client site routing. It always shows the default locale.

To reproduce:

1. Download this project, npm install, npm run dev, go to http://localhost:3000
2. Navigate through the pages and locales using the links on the page
3. Note that while navigating with the link or with the browser back/forward buttons, the CLI log from the middleware.js will show the default locale for nextUrl.locale (i.e., "en-US"), though the correct locale is part of the path nextUrl.pathname.