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Bug: dev-mode Component Performance Track prop diff re-walks aliased references; cost scales linearly with alias count

Status: Open.

#37628 In react/react;

· binaryphile opened on Sep 14, 2026

[DevTools Bug]: standalone startServer ignores the host argument and listens beyond loopback

Component: Developer Tools

Status: UnconfirmedA potential issue that we haven't yet confirmed as a bugA potential issue that we haven't yet confirmed as a bug

Type: Bug

Status: Open.

#37624 In react/react;

· taxor03 opened on Sep 14, 2026

Bug:

Status: UnconfirmedA potential issue that we haven't yet confirmed as a bugA potential issue that we haven't yet confirmed as a bug

Status: Open.

#37623 In react/react;

· edialver760-dotcom opened on Sep 14, 2026

Bug: Suspense fallback remounts on hydration after use(browser()) + client use(promise)

Status: UnconfirmedA potential issue that we haven't yet confirmed as a bugA potential issue that we haven't yet confirmed as a bug

Status: Open.

#37620 In react/react;

· michaltarasiuk opened on Sep 13, 2026

[Flight] Cyclic references inside Map/Set values are silently corrupted to null on the client

Status: Open.

#37619 In react/react;

· Jia-ben00 opened on Sep 13, 2026

Bug:

Status: UnconfirmedA potential issue that we haven't yet confirmed as a bugA potential issue that we haven't yet confirmed as a bug

Status: Open.

#37617 In react/react;

· Kouame008 opened on Sep 12, 2026

[Fizz]: An error thrown without a Suspense boundary rejects the shell w/ no recovery primitive

Status: UnconfirmedA potential issue that we haven't yet confirmed as a bugA potential issue that we haven't yet confirmed as a bug

Status: Open.

#37616 In react/react;

· switz opened on Sep 12, 2026

Bug: ViewTransition enter/exit (class-based) pattern is never activated during Next.js 16 App Router client-side navigation — only name (morph) mode calls document.startViewTransition

Status: UnconfirmedA potential issue that we haven't yet confirmed as a bugA potential issue that we haven't yet confirmed as a bug

Status: Open.

#37614 In react/react;

· TTANF1 opened on Sep 12, 2026

Bug: FragmentInstance.compareDocumentPosition alternates between FOLLOWING and IMPLEMENTATION_SPECIFIC on every other render

Status: UnconfirmedA potential issue that we haven't yet confirmed as a bugA potential issue that we haven't yet confirmed as a bug

Status: Open.

#37610 In react/react;

· uhyo opened on Sep 12, 2026

Bug: Portaled Fragment refs report their children disconnected inside ShadowRoot or DocumentFragment

Status: Open.

#37606 In react/react;

· Liuzikaii opened on Sep 11, 2026

Bug: DevTools DOM lookup cannot find React-managed title, meta and non-resource link elements

Status: Open.

#37604 In react/react;

· Liuzikaii opened on Sep 11, 2026

Bug: DevTools facade returns non-serializable BigInt props and hook values

Status: Open.

#37602 In react/react;

· Liuzikaii opened on Sep 11, 2026