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[Turbopack] Excessive Fast Refresh rebuilds when dev server runs on Bun runtime

Status: Open.

Bug

#89530 In vercel/next.js;

· MrScotch679 opened on Feb 5, 2026

CRITICAL [Turbopack | CSS]: CSS prioritization differs between next dev --turbopack and next build --turbopack

CSSRelated to CSS.Related to CSS.

TurbopackRelated to Turbopack with Next.js.Related to Turbopack with Next.js.

Status: Open.

Bug

#89523 In vercel/next.js;

· GlebKodrik opened on Feb 5, 2026

Support non-standard properties in <code>robots.ts</code> file

Status: Open.

Bug

#89521 In vercel/next.js;

· Joozty opened on Feb 5, 2026

Ignored next.config images.qualities inside tests

Image (next/image)Related to Next.js Image Optimization.Related to Next.js Image Optimization.

TestingRelated to testing with Next.js.Related to testing with Next.js.

Status: Open.

Bug

#89492 In vercel/next.js;

· PierreNoll opened on Feb 4, 2026

Next.js standalone output does not run Node.js instrumentation code

InstrumentationRelated to Next.js Instrumentation.Related to Next.js Instrumentation.

OutputRelated to the the output configuration option.Related to the the output configuration option.

RuntimeRelated to Node.js or Edge Runtime with Next.js.Related to Node.js or Edge Runtime with Next.js.

Status: Open.

Bug

#89377 In vercel/next.js;

· yunsii opened on Feb 2, 2026

next.js 15.5.9 works on OpenBSD/adJ 7.8 but next.js 16 does not

create-next-appRelated to our CLI tool for quickly starting a new Next.js application.Related to our CLI tool for quickly starting a new Next.js application.

Status: Open.

Bug

#89305 In vercel/next.js;

· vtamara opened on Jan 30, 2026

App Router includes unused CSS module in unrelated routes (bundle analyzer + runtime)

CSSRelated to CSS.Related to CSS.

TurbopackRelated to Turbopack with Next.js.Related to Turbopack with Next.js.

WebpackRelated to Webpack with Next.js.Related to Webpack with Next.js.

Status: Open.

Bug

#89252 In vercel/next.js;

· t18n opened on Jan 29, 2026

[Turbopack] Duplicate class definitions across route chunks, breaking <code>instanceof</code>

TurbopackRelated to Turbopack with Next.js.Related to Turbopack with Next.js.

Status: Open.

Bug

#89192 In vercel/next.js;

· TrevorBurnham opened on Jan 28, 2026

Next 16.0.11 emits a <code>[baseline-browser-mapping] The data in this module is over two months old.</code> warning

create-next-appRelated to our CLI tool for quickly starting a new Next.js application.Related to our CLI tool for quickly starting a new Next.js application.

Status: Open.

Bug

#89190 In vercel/next.js;

· eliw00d opened on Jan 28, 2026

<code>Object.defineProperty called on non-object</code> error with pdfjs-dist in webpack mode (possibly related to webpack/webpack#20095)

WebpackRelated to Webpack with Next.js.Related to Webpack with Next.js.

Status: Open.

Bug

#89177 In vercel/next.js;

· makotot opened on Jan 28, 2026

Docs: Clicking on Learn Next.js button leads to page with missing text

Status: Open.

Documentation

#89170 In vercel/next.js;

· henrikvilhelmberglund opened on Jan 28, 2026

[Turbopack] TypeScript Namespace Merging causes ReferenceError during runtime

SWCRelated to minification/transpilation in Next.js.Related to minification/transpilation in Next.js.

TurbopackRelated to Turbopack with Next.js.Related to Turbopack with Next.js.

Status: Open.

Bug

#89136 In vercel/next.js;

· rubenferreira97 opened on Jan 28, 2026