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[Compiler Bug]: Component defined inside function cause incorrect optimization

Component: React Compiler

Type: Bug

Status: Open.

#33978 In facebook/react;

· suguanYang opened on Jul 24, 2025

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.

#33974 In facebook/react;

· Fariborzfofo opened on Jul 23, 2025

Bug: Exception thrown by Error Boundary after production build in React 19, not visible in UI but reported via monitoring

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.

#33967 In facebook/react;

· iamamitshrma opened on Jul 22, 2025

Bug: [React 19] Suspense fallback with periodic state updates causes suspense children with slow render functions to never show

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.

#33939 In facebook/react;

· yiding opened on Jul 18, 2025

Bug: <code>React.use</code> inside <code>React.lazy</code>-ed component returns other <code>React.use</code> value on SSR

Component: Server Rendering

Type: Bug

Status: Open.

#33937 In facebook/react;

· hi-ogawa opened on Jul 18, 2025

Bug: 'use' is not exported from 'react' (imported as 'React5')

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.

#33805 In facebook/react;

· dineshkumarece opened on Jul 17, 2025

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.

#33803 In facebook/react;

· SQuikMunnaIT opened on Jul 17, 2025

Bug: The UMD builds for react and react-dom are not building correctly

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.

#33794 In facebook/react;

· deepak427 opened on Jul 16, 2025

Feature request: SimpleMemoComponent fast path for React.memo with custom arePropsEqual

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.

#33793 In facebook/react;

· barryam3 opened on Jul 15, 2025

Bug: Using custom elements with createPortal() in a documentPictureInPicture window is failing

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.

#33783 In facebook/react;

· derwebcoder opened on Jul 13, 2025

[Compiler Bug]: Mutating local variable created from destructuring a prop is incorrectly detected as a prop mutation

Component: React Compiler

Type: Bug

Status: Open.

#33781 In facebook/react;

· laug opened on Jul 13, 2025

Bug: useId() causes hydration mismatch when called inside conditionally rendered loops during SSR

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.

#33779 In facebook/react;

· AjayKumbham opened on Jul 12, 2025