diff --git a/frontend/src/api/queries/useAllSettings.ts b/frontend/src/api/queries/useAllSettings.ts
index e83539a26..0d6cb757b 100644
--- a/frontend/src/api/queries/useAllSettings.ts
+++ b/frontend/src/api/queries/useAllSettings.ts
@@ -77,6 +77,7 @@ export function useAllSettings() {
       if (!msg?.success) return;
       if (saved) markSaved(saved);
       queryClient.invalidateQueries({ queryKey: keys.settings.all() });
+      queryClient.invalidateQueries({ queryKey: keys.settings.defaults() });
     },
   });
 
diff --git a/frontend/src/test/use-all-settings.test.tsx b/frontend/src/test/use-all-settings.test.tsx
index e7f197bd6..dba588f51 100644
--- a/frontend/src/test/use-all-settings.test.tsx
+++ b/frontend/src/test/use-all-settings.test.tsx
@@ -13,6 +13,67 @@ afterEach(() => {
 });
 
 describe('useAllSettings', () => {
+  it('refreshes cached default settings after a successful save', async () => {
+    vi.spyOn(HttpUtil, 'post').mockResolvedValue(new Msg(true, '', {}));
+    const queryClient = makeTestQueryClient();
+    const fetchDefaults = vi
+      .fn()
+      .mockResolvedValueOnce({ subURI: 'https://example.com/sub/' })
+      .mockResolvedValueOnce({ subURI: 'https://example.com/my_custom_path/' });
+    const defaultsQuery = {
+      queryKey: keys.settings.defaults(),
+      queryFn: fetchDefaults,
+      staleTime: Infinity,
+    };
+    const wrapper = ({ children }: { children: ReactNode }) => (
+      <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
+    );
+
+    await queryClient.fetchQuery(defaultsQuery);
+    const { result } = renderHook(() => useAllSettings(), { wrapper });
+
+    await waitFor(() => expect(result.current.fetched).toBe(true));
+    await act(async () => {
+      await result.current.saveAll();
+    });
+
+    const defaults = await queryClient.fetchQuery(defaultsQuery);
+    expect(fetchDefaults).toHaveBeenCalledTimes(2);
+    expect(defaults.subURI).toBe('https://example.com/my_custom_path/');
+  });
+
+  it('keeps cached default settings when a save fails', async () => {
+    vi.spyOn(HttpUtil, 'post').mockImplementation(async (url) => {
+      if (url === '/panel/api/setting/update') return new Msg(false, 'Save failed');
+      return new Msg(true, '', {});
+    });
+    const queryClient = makeTestQueryClient();
+    const fetchDefaults = vi
+      .fn()
+      .mockResolvedValueOnce({ subURI: 'https://example.com/sub/' })
+      .mockResolvedValueOnce({ subURI: 'https://example.com/my_custom_path/' });
+    const defaultsQuery = {
+      queryKey: keys.settings.defaults(),
+      queryFn: fetchDefaults,
+      staleTime: Infinity,
+    };
+    const wrapper = ({ children }: { children: ReactNode }) => (
+      <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
+    );
+
+    await queryClient.fetchQuery(defaultsQuery);
+    const { result } = renderHook(() => useAllSettings(), { wrapper });
+
+    await waitFor(() => expect(result.current.fetched).toBe(true));
+    await act(async () => {
+      await result.current.saveAll();
+    });
+
+    const defaults = await queryClient.fetchQuery(defaultsQuery);
+    expect(fetchDefaults).toHaveBeenCalledOnce();
+    expect(defaults.subURI).toBe('https://example.com/sub/');
+  });
+
   it('accepts legacy overlength regex settings without logging a response validation warning', async () => {
     const subJsonUserAgentRegex = 'x'.repeat(2_049);
     vi.spyOn(HttpUtil, 'post').mockResolvedValue(new Msg(true, '', { subJsonUserAgentRegex }));