You are visiting /src/pages/posts.tsx
Notice the url. If the middleware.ts file is active, clicking <Link href="/postings" /> will show as "postings". Refreshing the page will follow the redirect. Disabling the middleware.ts file it will also just do the redirected.
Using a regular hyperlink to <a href="/postings" /> will work fine but client side routing is not being used.
Middleware has been disabled via a matcher to /no-middleware. Both the good Link and Link to path with redirect work fine.