Please note that this only occurs when patching the headers function in patches/next_consider_headers_static.patch

Expected Behavior

Headers set in the middleware should be available when the page is loaded. E.g. when visting /test the page should show middleware header: test, from params: test2

Current Behavior

Headers set in the middleware are not available when the page is loaded on Vercel. This issue did not occur previously on Vercel but has recently surfaced. This functionality works correctly when running Next.js locally using pnpm run start.

When visiting https://missing-headers-reproduction.vercel.app/test the page shows middleware header: null, from params: test