diff --git a/.changeset/query-client-compat-regression.md b/.changeset/query-client-compat-regression.md
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+++ b/.changeset/query-client-compat-regression.md
@@ -0,0 +1,2 @@
+---
+---
diff --git a/packages/shared/src/react/hooks/__tests__/useOrganizationList.hotload-compat.spec.tsx b/packages/shared/src/react/hooks/__tests__/useOrganizationList.hotload-compat.spec.tsx
new file mode 100644
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+++ b/packages/shared/src/react/hooks/__tests__/useOrganizationList.hotload-compat.spec.tsx
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+import type { QueryClient } from '@tanstack/query-core';
+import { QueryClient as TanstackQueryClient } from '@tanstack/query-core';
+import { renderHook, waitFor } from '@testing-library/react';
+import React from 'react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+const mockState = vi.hoisted(() => ({
+  clerk: undefined as any,
+  user: undefined as any,
+}));
+
+vi.mock('../../contexts', () => ({
+  useAssertWrappedByClerkProvider: () => {},
+  useClerkInstanceContext: () => mockState.clerk,
+  useInitialStateContext: () => undefined,
+}));
+
+vi.mock('../base/useUserBase', () => ({
+  useUserBase: () => mockState.user,
+}));
+
+// Models pre-PR #8434 @clerk/shared, which reads the hotloaded Clerk.js
+// `__internal_queryClient` bridge and waits for `queryClientStatus`.
+vi.mock('../../query/use-clerk-query-client', () => {
+  type RecursiveMock = {
+    (...args: unknown[]): RecursiveMock;
+  } & {
+    readonly [key in string | symbol]: RecursiveMock;
+  };
+
+  function createRecursiveProxy(label: string): RecursiveMock {
+    const callableTarget = function noop(): void {};
+    const handler: ProxyHandler<typeof callableTarget> = {
+      get(_target, prop) {
+        if (prop === 'then') {
+          return undefined;
+        }
+        if (prop === 'toString') {
+          return () => `[${label}]`;
+        }
+        if (prop === Symbol.toPrimitive) {
+          return () => 0;
+        }
+        return self;
+      },
+      apply() {
+        return self;
+      },
+      construct() {
+        return self as unknown as object;
+      },
+      has() {
+        return false;
+      },
+      set() {
+        return false;
+      },
+    };
+
+    const self = new Proxy(callableTarget, handler) as unknown as RecursiveMock;
+    return self;
+  }
+
+  const mockQueryClient = createRecursiveProxy('LegacyClerkMockQueryClient') as unknown as QueryClient;
+  const isLegacyQueryClient = (value: unknown): value is { __tag: 'clerk-rq-client'; client: QueryClient } =>
+    typeof value === 'object' &&
+    value !== null &&
+    '__tag' in value &&
+    (value as { __tag?: string }).__tag === 'clerk-rq-client';
+
+  const useClerkQueryClient = (): [QueryClient, boolean] => {
+    const clerk = mockState.clerk;
+    const queryClient = clerk.__internal_queryClient;
+    const [queryClientLoaded, setQueryClientLoaded] = React.useState(isLegacyQueryClient(queryClient));
+
+    React.useEffect(() => {
+      const setLoaded = () => setQueryClientLoaded(true);
+      clerk.on('queryClientStatus', setLoaded);
+      return () => clerk.off('queryClientStatus', setLoaded);
+    }, [clerk]);
+
+    const isLoaded = queryClientLoaded && isLegacyQueryClient(queryClient);
+    return [isLoaded ? queryClient.client : mockQueryClient, isLoaded];
+  };
+
+  return { useClerkQueryClient };
+});
+
+import { useOrganizationList } from '../useOrganizationList';
+
+function createHotloadedClerkQueryClientShim() {
+  const listeners = new Set<(status: 'ready') => void>();
+  let isResolving = false;
+  let queryClient: { __tag: 'clerk-rq-client'; client: TanstackQueryClient } | undefined;
+
+  return {
+    loaded: true,
+    telemetry: { record: vi.fn() },
+    setActive: vi.fn(),
+    createOrganization: vi.fn(),
+    // Reached transitively via useAttemptToEnableOrganizations.
+    __internal_attemptToEnableEnvironmentSetting: vi.fn(),
+    get __internal_queryClient() {
+      if (!queryClient && !isResolving) {
+        isResolving = true;
+        void Promise.resolve().then(() => {
+          queryClient = {
+            __tag: 'clerk-rq-client',
+            client: new TanstackQueryClient({
+              defaultOptions: {
+                queries: {
+                  retry: false,
+                  staleTime: Infinity,
+                  refetchOnMount: false,
+                  refetchOnReconnect: false,
+                  refetchOnWindowFocus: false,
+                },
+              },
+            }),
+          };
+          listeners.forEach(listener => listener('ready'));
+        });
+      }
+      return queryClient;
+    },
+    on: vi.fn((event: string, listener: (status: 'ready') => void) => {
+      if (event === 'queryClientStatus') {
+        listeners.add(listener);
+      }
+    }),
+    off: vi.fn((event: string, listener: (status: 'ready') => void) => {
+      if (event === 'queryClientStatus') {
+        listeners.delete(listener);
+      }
+    }),
+  };
+}
+
+afterEach(() => {
+  vi.clearAllMocks();
+  mockState.clerk = undefined;
+  mockState.user = undefined;
+});
+
+describe('useOrganizationList hotload compatibility', () => {
+  it('leaves the legacy mock query-client state and requests organization memberships', async () => {
+    const fapiRequest = vi.fn((_request: unknown) =>
+      Promise.resolve({
+        data: [],
+        total_count: 0,
+      }),
+    );
+    const membershipRequest = vi.fn((params?: { initialPage?: number; pageSize?: number }) => {
+      return fapiRequest({
+        path: '/me/organization_memberships',
+        method: 'GET',
+        search: params,
+      });
+    });
+
+    mockState.clerk = createHotloadedClerkQueryClientShim();
+    mockState.user = {
+      id: 'user_123',
+      getOrganizationMemberships: membershipRequest,
+    };
+
+    const { result } = renderHook(() =>
+      useOrganizationList({
+        userMemberships: {
+          pageSize: 2,
+        },
+      }),
+    );
+
+    expect(result.current.isLoaded).toBe(true);
+    expect(result.current.userMemberships.isLoading).toBe(true);
+    expect(membershipRequest).not.toHaveBeenCalled();
+
+    await waitFor(() => expect(membershipRequest).toHaveBeenCalledTimes(1));
+    expect(membershipRequest).toHaveBeenCalledWith({ initialPage: 1, pageSize: 2 });
+    expect(fapiRequest).toHaveBeenCalledWith({
+      path: '/me/organization_memberships',
+      method: 'GET',
+      search: { initialPage: 1, pageSize: 2 },
+    });
+    await waitFor(() => expect(result.current.userMemberships.isLoading).toBe(false));
+
+    expect(result.current.userMemberships.isFetching).toBe(false);
+    expect(result.current.userMemberships.count).toBe(0);
+  });
+});