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Graph/state-staleness-mismerge

Pattern

Redux/Zustand State Staleness

state-staleness-mismerge

State and callbacks become stale or mismerged because updates happen outside the current closure or are not integrated by reducers/middleware, so the UI reads old values (or wrong shapes) and async flows appear inconsistent.

Node Details

Public graph metadata

Updated7/31/2026

Connections

30 linked nodes

Zustand persist middleware does not write during the test setup

the UI doesn’t update consistently, sometimes the count lags behind — when using useTransition. Tension: especially after fast re-renders or route changes. Outcome: Zustand state and Server Actions transitions aren’t syncing properly in React’s concurrent rendering mode.

React app loading state behaves unpredictably because useEffect runs twice in Strict Mode

I'm building a Next.js 14 app that uses Zustand with the persist middleware to store authentication tokens and user info. Tension: authenticated pages redirect me to /error/unauthorized. Outcome: React has detected a change in the order of Hooks...

Initializing a Zustand store with data fetched asynchronously from an API is messy when using a separate init() function, requiring extra state like isInitialized to prevent subscribers from running too early. The store creation function cannot be async, so awaiting fetches during createStore is not possible.

When using Zustand with the devtools middleware, only one store’s actions/state could be inspected at a time in browser DevTools despite creating multiple stores. Additional imports of alternative devtools middleware options did not enable multiple stores to appear.

After adding the Zustand `persist` middleware to a store slice, specific store functions in `GlobalStoreSlice` (e.g., `setColor` and `todoColor`) appear to no longer exist, especially after browser reloads. Other state not wrapped by `persist` continues to work.

A TypeScript error occurs when using Zustand's persist middleware with a custom StateCreator, stating that a StateCreator argument is not assignable to the expected StateCreator type due to mismatched $$storeMutators typing.

Updating `storagePolicySettings` in a Zustand store does not work as expected when using `set((state) => ({ ...state, storagePolicySettings }))` after fetching data.

Updating an input causes the entire React app to refresh/re-render, even though only part of the Zustand state should change.

@ts-check with Zustand slices and JSDoc does not type-check the bound store correctly

Zustand persistence to AsyncStorage does not return the expected token value after calling setToken; the logged result includes wrapped Zustand persist metadata (state/version).

Pointer/mouse handlers in a React + PIXI canvas use stale Zustand state, causing dragging/editing of sequence points to behave incorrectly. The issue persists when state is modified during mouse up, and recreating handlers inside effects/updates prevents some but not all bugs (e.g., cannot drag twice).

When multiple React components use Zustand selectors like `useStore(state => state.largeDataset)`, does each component end up copying the large dataset into its own memory, increasing total RAM usage?

A Zustand store value (e.g., currentUser) logs as null on first access, but becomes correct after a rerender. This suggests the expected persisted data hasn’t finished loading yet.

Storing a huge state object (e.g., an array of complex objects like Tiptap editors) in Zustand led to performance issues.

After migrating to React 18, dynamically importing a language-specific component with React.lazy based on a zustand state variable causes the component to infinitely render/loading.

A Zustand store updates a `time` value every second via `setInterval`, but child components that consume the store do not re-render to reflect the updated time.

Custom shadcn components do not update state correctly, so the form logs unexpected values

Using a Zustand store to control TanStack Table v8 state causes errors because the table calls change handlers with an updater function, but the store setters only accept raw values.

A React Query mutation's state (e.g., loading/error/success) needs to be observed from a different component than the one that triggered the mutation.

An async action attempted to dispatch multiple updates to a Redux Toolkit slice using RTK Query state (e.g., loading/error/data), but the dispatch/flow did not properly work. The goal was to store RTK Query results into the studentSlice state.

Reactotron setup for viewing Redux state fails with a TypeError: Cannot read property 'store' of undefined.

After logging out successfully, re-registering or signing in does not reset the Redux state flags `isLogouting` and `isOpeLogoutDialogue` back to `false`, leaving the UI in an incorrect loading/dialog state.

A reselect selector that returns a combined wallet object (wallet + computed balance) causes React components to rerender on any Redux state change, even when the selected data did not change.

The dispatched Redux actions from the transactions slice are not being handled, so the reducers do not run. The user asks how their useDispatch hook setup is incorrect.

Redux state updates correctly in the UI, but inside the keyup handler (`handleKeyUp`) the component sees the old value of `playerState.isMenuUIVisible`. As a result, conditional logic (e.g., Escape handling) doesn’t run when expected.

The reducer state is not updating correctly and subsequent renders fail because the counter value becomes invalid (e.g., NaN) instead of changing from its initial value.

Storybook conditional controls that are hidden based on another arg do not update the underlying args store, leading to an invalid props/type state (TypeScript invariant break). Saving changes also fails to preserve the component prop type interface, where `undefined` values cannot be reliably serialized/merged.

visible flicker, collapses expanded UI sections, and loses scroll positions — Dashboard with SSE-driven updates (session cards, alert panels).

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