vercel

React Compiler + Turbopack: lazy useState initializer throws TDZ when helper function declarations appear later in the same hook Open

SWC Turbopack

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vercel/next.js#98820 · 1 comment · Opened Sep 17, 2026

Turbopack: nested next/dynamic gets no SSR stylesheet link, causing FOUC and layout shift (App Router) Open

CSS Lazy Loading Module Resolution Turbopack

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vercel/next.js#98804 · Opened Sep 17, 2026

Turbopack traces a pnpm hoisted-store alias without its target files, producing a dangling symlink that fails Vercel deploys with ENOENT Open

Module Resolution Output Turbopack

Difficulty 4/5 3-5 days Newbie friendliness 58/100

vercel/next.js#98791 · 2 comments · 1 reaction · Opened Sep 17, 2026

[App Router] Critical layout CSS lacks preload link hints in document head Open

Performance

Difficulty 3/5 1-2 days Newbie friendliness 78/100

vercel/next.js#98756 · 2 comments · Opened Sep 16, 2026

[PPR] Search crawlers bypass static shell cache and trigger dynamic re-renders Open

Difficulty 4/5 3-5 days Newbie friendliness 72/100

vercel/next.js#98750 · 2 comments · Opened Sep 16, 2026

[App Router] AI search crawlers and TelegramBot miss streaming metadata in Edge SSR Open

Runtime

Difficulty 4/5 3-5 days Newbie friendliness 72/100

vercel/next.js#98748 · 1 comment · Opened Sep 16, 2026

Partial Prefetching: generated routes return HTTP 500 on a cold custom-cache miss Open

Dynamic Routes Runtime

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vercel/next.js#98732 · 2 comments · Opened Sep 16, 2026

Searchparams not working when `cacheComponents` and `draftMode` are enabled Open

Draft Mode

vercel/next.js#98720 · 1 comment · 1 assignee · Opened Sep 16, 2026

Instant-navigation validation reports a deliberate `redirect()` from a layout as a validation failure Open

Error Overlay Redirects

Difficulty 3/5 1-2 days Newbie friendliness 74/100

vercel/next.js#98711 · 1 comment · Opened Sep 16, 2026

Turbopack dev: a route handler compiled after N pages costs ~16 MB × N (50 pages + 34 handlers → 29 GB); regressed in 16.3.0-canary.101 Open

Performance Route Handlers Turbopack

Difficulty 5/5 Over a week Newbie friendliness 35/100

vercel/next.js#98707 · Opened Sep 16, 2026

Turbopack: HMR stops updating after client navigation Open

Linking and Navigating Turbopack

Difficulty 4/5 3-5 days Newbie friendliness 57/100

vercel/next.js#98699 · 1 reaction · Opened Sep 15, 2026

App Router: a <Link> clicked while its prefetch is in flight commits with no <title> (and can commit an empty segment) — Pending segment-cache entry is handed to React as a plain promise Open

Linking and Navigating Loading UI and Streaming Metadata

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vercel/next.js#98684 · Opened Sep 15, 2026

output: "standalone" + next-i18next: user config not copied into standalone output on 16.3.x (regression from 16.2.x) Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

vercel/next.js#98628 · 1 comment · Opened Sep 14, 2026

cacheComponents bfcache: <Activity> children are ordered most-recently-active, so returning to a route re-parents its DOM and reloads every iframe inside it (2nd visit onward) Open

Linking and Navigating

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vercel/next.js#98623 · 1 comment · Opened Sep 14, 2026

ISR background revalidation stores the finished response's Link header, dropping React's early hints from regenerated PPR entries Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

vercel/next.js#98600 · 2 comments · Opened Sep 12, 2026

Bundling fails for package `bknd` in turbopack Open

Turbopack

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vercel/next.js#98596 · Opened Sep 12, 2026

next/image: /_next/image returns 500 (raw "fetch failed") when the remote host fails DNS or refuses the connection Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vercel/next.js#98569 · Opened Sep 11, 2026

after(): a task that never settles retains the request's async context for the life of the server Open

After Performance Route Handlers

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vercel/next.js#98561 · Opened Sep 11, 2026

Client navigation breaks (React #412 / RSC 404) after ISR regenerates a route that was prerendered as a fully static redirect() — build-time prefetchDataRoute forces static RSC serving of a now-postponed entry Open

Dynamic Routes Linking and Navigating Redirects

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vercel/next.js#98555 · Opened Sep 11, 2026

cachedNavigations session-shell prerender races an async cacheHandlers.default get: E1163 on every dynamic render with deterministic keys Open

Cache Components Runtime

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vercel/next.js#98543 · 3 comments · Opened Sep 11, 2026

[next-rspack] NextExternalsPlugin wrongly externalizes transpilePackages direct dependencies on Windows + pnpm (dev only, pages router) Open

Runtime

Difficulty 4/5 3-5 days Newbie friendliness 68/100

vercel/next.js#98505 · Opened Sep 10, 2026

Streamed metadata wrapper is a <div> as the first child of <body>, so a third-party <div> prepended before hydration breaks hydration and gets deleted Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

vercel/next.js#98500 · Opened Sep 10, 2026

`next dev`: RangeError "Maximum call stack size exceeded" when the first compiled route has 8 URL segments (cacheComponents + a client component); heals after any shallower route compiles Open

Turbopack

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vercel/next.js#98492 · Opened Sep 10, 2026

@next/codemod upgrade pins ESLint to 10 unprompted, failing install for projects using eslint-plugin-import Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vercel/next.js#98417 · 1 comment · Opened Sep 9, 2026

next/form does not normalize newlines in GET submissions after hydration Open

Form (next/form)

Difficulty 3/5 1-2 days Newbie friendliness 74/100

vercel/next.js#98405 · Opened Sep 9, 2026

next/image: a client that disconnects mid-request permanently hangs that /_next/image cache key for every later client (self-hosted) Open

Image (next/image)

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vercel/next.js#98402 · 1 comment · Opened Sep 9, 2026

Pages Router: ssr:false dynamic imports mismatch when hydration retries after the import resolves Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vercel/next.js#98394 · Opened Sep 9, 2026

Dynamic client import causes instant validation error in development Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

vercel/next.js#98393 · Opened Sep 9, 2026

next/dynamic in a module imported by both routers gets the App Router module id in react-loadable-manifest.json — pages-router hydration fails with React #418 (webpack) Open

Lazy Loading Pages Router Webpack

Difficulty 3/5 1-2 days Newbie friendliness 75/100

vercel/next.js#98384 · 1 comment · Opened Sep 8, 2026

next dev overrides container-aware V8 heap limit using host memory Open

Performance Runtime

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vercel/next.js#98381 · Opened Sep 8, 2026

styledComponents: css prop hoisting causes "Cannot access 'X' before initialization" Open

CSS SWC Turbopack Webpack

Difficulty 4/5 3-5 days Newbie friendliness 68/100

vercel/next.js#98359 · 2 comments · Opened Sep 8, 2026

router.prefetch redirect loop Open

Redirects

Difficulty 4/5 3-5 days Newbie friendliness 50/100

vercel/next.js#98345 · 3 comments · Opened Sep 8, 2026

generateStaticParams with output=export is flaky in dev env with encoded params Open

Dynamic Routes

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vercel/next.js#98344 · 1 comment · Opened Sep 8, 2026

`useId()` in Server Components returns duplicate ids after a client-side navigation Open

Linking and Navigating React

vercel/next.js#98337 · 1 assignee · Opened Sep 8, 2026

router.refresh() scrolls to top after history.replaceState changed the search params (tree-mismatch retry uses ScrollBehavior.Default) Open

Linking and Navigating

Difficulty 4/5 3-5 days Newbie friendliness 65/100

vercel/next.js#98323 · 2 comments · 1 reaction · Opened Sep 7, 2026

ESLint migration codemod uses npx in a pnpm project Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

vercel/next.js#98308 · 2 comments · 1 reaction · Opened Sep 6, 2026

Runtime-rendered fully static pages on PPR routes are stored without .rsc and are never read back from the file-system cache (MISS forever) Open

Cache Components

Difficulty 3/5 1-2 days Newbie friendliness 74/100

vercel/next.js#98306 · Opened Sep 6, 2026

Server Action update never commits: a transition lane stays suspended and is never pinged Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

vercel/next.js#98303 · 2 comments · Opened Sep 6, 2026

Turbopack build omits __NEXT_DATA__.dynamicIds for next/dynamic({ ssr: true }) declared in pages/_app — server HTML discarded on hydration Open

vercel/next.js#98287 · 2 comments · 1 assignee · Opened Sep 5, 2026

Turbopack build fails to parse valid CSS: named scroll-state container query Open

CSS Turbopack

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vercel/next.js#98261 · Opened Sep 4, 2026

Next Image component fails when a relative src redirects to an external image Open

Image (next/image) Redirects

Difficulty 3/5 1-2 days Newbie friendliness 55/100

vercel/next.js#98237 · 2 comments · 5 reactions · Opened Sep 3, 2026

NextJS Edge runtime process polyfill for process.getBuiltinModule (an optional API) throws when importing js-bson Open

Runtime

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vercel/next.js#98226 · 2 reactions · Opened Sep 3, 2026

cookies() inside after() returns pre-mutation values in a Route Handler Open

Route Handlers Runtime

Difficulty 4/5 3-5 days Newbie friendliness 50/100

vercel/next.js#98222 · Opened Sep 3, 2026

Dev server retains ~90 MB per edit of a Server Component and consumes memory without bounds Open

React Runtime Turbopack

Difficulty 5/5 Over a week Newbie friendliness 35/100

vercel/next.js#98221 · Opened Sep 3, 2026

[next-rspack] `next dev` aborts with a Rust panic when the error overlay or browser-log forwarding source-maps a frame during a rebuild Open

Rspack

Difficulty 4/5 3-5 days Newbie friendliness 72/100

vercel/next.js#98213 · Opened Sep 3, 2026

Dev HMR client reconnects forever after prerender activation (visibilitychange while socket is CONNECTING) Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vercel/next.js#98212 · Opened Sep 3, 2026

Pages Router: shallow `getRouteInfo()` returns the `__appRouter` prefetch marker as route info and crashes `_app` Open

Linking and Navigating Pages Router

Difficulty 4/5 3-5 days Newbie friendliness 58/100

vercel/next.js#98181 · 1 reaction · Opened Sep 2, 2026

Incorrect error message when awaiting params underneath 'use cache' Open

Difficulty 3/5 1-2 days Newbie friendliness 70/100

vercel/next.js#98173 · 2 comments · Opened Sep 2, 2026

Scroll to top does not work through redirects in proxy Open

Linking and Navigating Middleware Redirects

vercel/next.js#98172 · 1 comment · 1 assignee · Opened Sep 2, 2026

Config redirects fire on _next/data requests when middleware.ts is present, breaking client-side navigation Open

Middleware Redirects

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vercel/next.js#98142 · 3 comments · Opened Sep 1, 2026

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