Issues

• next dev: EPERM during Watchpack's initial scan silently drops a route directory (hangs, then 404 until restart)

  TurbopackWebpack
  Bug

  vercel/next.js#100268 · Filter by author gsnetland69 opened on Oct 15, 2026

• next dev reloads a page in a loop after a restart with a changed NEXT_PUBLIC_ value (Turbopack dev cache, 16.4)

  Turbopack
  Bug

  vercel/next.js#100267 · Filter by author samuelcole opened on Oct 15, 2026

• Turbopack: client-reference manifests and server chunks grow on 16.4 (standalone output larger, server RSS up)

  vercel/next.js#100260 · Filter by author nextor2k opened on Oct 15, 2026
  2

• cacheComponents: redirect() during a background revalidation is cached as 308 without a Location header

  Redirects
  vercel/next.js#100255 · Filter by author manuatgit opened on Oct 15, 2026

• Turbopack: tab reloads forever after restarting next dev (first HMR update is restart, regression in 16.4.0)

  Turbopack
  vercel/next.js#100251 · Filter by author dgomez-orangeloops opened on Oct 15, 2026

• Turbopack: on a 2,000-route app, a warm next build is slower than a cold one, and 192 CPUs are slower than 24

  PerformanceTurbopack
  vercel/next.js#100250 · Filter by author ejc3 opened on Oct 15, 2026
  2

• new URL() to a package in serverExternalPackages is treated as a require() (Turbopack warning, webpack build error)

  Module ResolutionTurbopackWebpack
  vercel/next.js#100227 · Filter by author HardMax71 opened on Oct 15, 2026

• Turbopack: next/font/google drops the metric-adjusted fallback face when fallback is set (webpack emits both)

  Font (next/font)Turbopack
  vercel/next.js#100221 · Filter by author FirstReefco opened on Oct 15, 2026

• React error #419 reported for notFound() streamed into a Suspense boundary

  Error HandlingLoading UI and StreamingNot Found
  vercel/next.js#100219 · Filter by author AdzerKI opened on Oct 15, 2026

• Turbopack loader gets truncated resourcePath when file path contains #

  Turbopack
  Bug

  vercel/next.js#100218 · Filter by author darcien opened on Oct 15, 2026
  1

• 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
  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: 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
  1

• 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