Issues

• next/image: every cache HIT waits for the full disk-LRU scan after server start (12 s stall with a persisted cache)

  Image (next/image)
  Bug

  vercel/next.js#100179 · Filter by author pawelhoros opened on Oct 14, 2026
  1

• Turbopack: with experimental.inlineCss, a lazy import loads a CSS chunk that the page already inlined

  CSSPerformanceTurbopack
  Bug

  vercel/next.js#100164 · Filter by author astoilkov opened on Oct 14, 2026

• Middleware body clone hands route handlers only the tail of a multi-chunk body (Node runtime, 15.5.27 and 16.0.0)

  MiddlewareRoute HandlersServer Actions
  vercel/next.js#100157 · Filter by author shward opened on Oct 14, 2026

• loading.tsx Suspense boundary never resolves on the client (Next 15 and 16; works on 14)

  Runtime
  vercel/next.js#100151 · Filter by author luizbernardes90 opened on Oct 14, 2026
  1

• Turbopack scope hoisting evaluates a merged module twice, duplicating module singletons

  Turbopack
  Bug

  vercel/next.js#100139 · Filter by author JalilArfaoui opened on Oct 13, 2026

• Turbopack: next build hangs (0% CPU, no error) when a Web Worker's module graph imports the module that spawns it

  Turbopack
  vercel/next.js#100131 · Filter by author a-c-sreedhar-reddy opened on Oct 13, 2026

• Turbopack: panic when a PostCSS plugin prints a stack trace while it loads

  CSSTurbopack
  Bug

  vercel/next.js#100125 · Filter by author HardMax71 opened on Oct 13, 2026

• Cache Components enabled causes HTTP 500 / Error 1101 on Cloudflare Workers

  Runtime
  Bug

  vercel/next.js#100122 · Filter by author gauravsinghlive opened on Oct 13, 2026
  2

• Parallel route slot matched by [...catchAll] keeps the old root param (locale) after client navigation in production

  Dynamic RoutesLinking and NavigatingParallel & Intercepting Routes
  Bug

  vercel/next.js#100115 · Filter by author pauksztello opened on Oct 13, 2026

• Turbopack: with turbopackFileSystemCacheForBuild a cold next build of a large App Router app is 2.1–2.6× slower (single-threaded aggregation-graph phase) and the 15–21 GB cache is mostly chunk-group dependency edges

  PerformanceTurbopack
  vercel/next.js#100086 · Filter by author vjeux opened on Oct 13, 2026

• experimental.turbopackRustReactCompiler drops development options the Babel React Compiler path sets (Fast Refresh memo-cache reset, anonymous function names, flow suppressions, TS source type)

  ReactTurbopack
  vercel/next.js#100085 · Filter by author vjeux opened on Oct 13, 2026

• Turbopack dev: next/dynamic in Pages Router _app preloads a 404 chunk (regression in 16.5.0-canary.8)

  Lazy LoadingPages RouterTurbopack
  vercel/next.js#100073 · Filter by author dcheng1290 opened on Oct 12, 2026

• Turbopack: next build spawns one webpack-loader process pool per loader chain × context since 16.4.0-canary.39 (hundreds of Node.js processes, OOM)

  PerformanceTurbopack
  vercel/next.js#100064 · Filter by author dlehmhus opened on Oct 12, 2026
  1

  

• Prefetch loop: optimistic routing drops a parallel slot's catch-all param next to a static segment

  Linking and NavigatingParallel & Intercepting Routes
  vercel/next.js#100055 · Filter by author pablodecm opened on Oct 12, 2026

• Turbopack: webpackChunkName ignored when migrating from webpack

  Lazy LoadingOutputTurbopack
  vercel/next.js#100051 · Filter by author karlhorky opened on Oct 12, 2026
  3

  

• Turbopack dev server deadlocks deferred route compilation after a proxy request (16.4.0)

  InstrumentationLazy LoadingMiddlewareRuntimeTurbopack
  Bug

  vercel/next.js#100022 · Filter by author Naaikho opened on Oct 12, 2026
  2

• next/dynamic script preloads lack crossOrigin, so Turbopack can't reuse them since #92070 — ~1s delay per chunk with a cross-site assetPrefix

  Lazy LoadingPerformanceTurbopack
  Bug

  vercel/next.js#100014 · Filter by author yu1222 opened on Oct 12, 2026

• Truncated HTML on first load leaves App Router page unhydrated with an unhandled 'Connection closed.' (React #412) rejection

  Error HandlingRuntime
  vercel/next.js#100007 · Filter by author paurushrai opened on Oct 12, 2026

• Segment cache: unbounded re-prefetch loop (thousands of _rsc requests per minute) for <Link>s whose dynamic segment holds a raw : (not percent-encoded), with optimistic routing

  Dynamic RoutesLinking and NavigatingPerformance
  vercel/next.js#99988 · Filter by author chrisgeo opened on Oct 11, 2026
  2

• next dev retains heap on every App Router render (16.4.0): linear growth that survives forced GC

  Performance
  vercel/next.js#99983 · Filter by author vlegacy opened on Oct 10, 2026
  2

• Turbopack keeps unused exports of a namespace reached through another namespace (lib.core.X)

  PerformanceTurbopack
  vercel/next.js#99954 · Filter by author colinhacks opened on Oct 9, 2026

• Unused imports in generated .next/dev/types/validator.ts fail type-check with noUnusedLocals for metadata-only apps (since 16.4.0)

  TypeScript
  vercel/next.js#99919 · Filter by author lyonzin opened on Oct 9, 2026

• Server action that calls notFound() without JavaScript renders the not-found page without the root layout

  Not FoundServer Actions
  vercel/next.js#99913 · Filter by author HardMax71 opened on Oct 9, 2026

• Vercel: launcher crashes with Cannot find module './.next/server/pages/_next/image.js' when an image optimizer local source returns 5xx

  Image (next/image)Runtime
  Bug

  vercel/next.js#99911 · Filter by author arjenblokzijl opened on Oct 9, 2026
  2

• useServerInsertedHTML output is duplicated in prerendered HTML with cacheComponents

  CSS
  vercel/next.js#99905 · Filter by author dgattey opened on Oct 8, 2026