diff --git a/cocoscreator_projects/YouleNexus/assets/scripts/local-platform-login/local-login-host.ts b/cocoscreator_projects/YouleNexus/assets/scripts/local-platform-login/local-login-host.ts
index 00e6418..f7d1cf9 100644
--- a/cocoscreator_projects/YouleNexus/assets/scripts/local-platform-login/local-login-host.ts
+++ b/cocoscreator_projects/YouleNexus/assets/scripts/local-platform-login/local-login-host.ts
@@ -138,10 +138,24 @@ export function createLocalLoginHost(options: LocalLoginHostOptions): LocalLogin
           if (model.kind === 'denial') serverFailure = { data: model.outcome.data };
           if (model.kind === 'kicked') serverFailure = { data: model.data };
           try { options.view.showOverlay(model); }
-          catch (error) { transportFault(error); throw error; }
+          catch (error) {
+            if (model.kind === 'fatal') fail(collected([model.error, error]));
+            else transportFault(error);
+            throw error;
+          }
           if (model.kind === 'fatal') fail(model.error);
         },
-      }, options.scheduler, fail);
+      }, {
+        request: callback => {
+          try {
+            const cancel = options.scheduler.request(callback);
+            return () => {
+              try { cancel(); }
+              catch (error) { fail(error); throw error; }
+            };
+          } catch (error) { fail(error); throw error; }
+        },
+      }, fail);
       runtime = new PlatformRuntime({ gameEntry: entry,
         resolveRuntimeConfig: async () => context.config,
         createWireClient: () => createLocalLoginWire({ context, record: options.record, onFault: wireFault,
diff --git a/cocoscreator_projects/framework-tests/local-platform-login/host.test.ts b/cocoscreator_projects/framework-tests/local-platform-login/host.test.ts
index 9b244f0..c3fcea9 100644
--- a/cocoscreator_projects/framework-tests/local-platform-login/host.test.ts
+++ b/cocoscreator_projects/framework-tests/local-platform-login/host.test.ts
@@ -29,6 +29,7 @@ class Socket {
   push(message: unknown) { this.onmessage?.({ data: JSON.stringify(message) }); }
 }
 async function setup(overrides: { config?: Partial<ResolveRuntimeConfigOptions>; render?: (model: PageModel) => void;
+  cancelFrame?: () => void; showOverlay?: (model: OverlayModel) => void;
   record?: (event: { kind: string; data: unknown }) => void; onBusy?: (busy: boolean) => void } = {}) {
   const api = await import('../../YouleNexus/assets/scripts/local-platform-login/local-login-host.ts')
     .catch(error => assert.fail(`Local login host implementation must exist: ${String(error)}`));
@@ -43,8 +44,8 @@ async function setup(overrides: { config?: Partial<ResolveRuntimeConfigOptions>;
     storage: { getItem: key => values.get(key) ?? null, setItem: (key, value) => { values.set(key, value); } },
     random: () => .5, now: () => 123456, sampleHost: () => ({ location: null }),
     view: { render: model => { overrides.render?.(model); pages.push(model); },
-      activate: page => { activations.push(page); }, showOverlay: model => { overlays.push(model); } },
-    scheduler: { request: callback => { frames.add(callback); return () => { frames.delete(callback); }; } },
+      activate: page => { activations.push(page); }, showOverlay: model => { overlays.push(model); overrides.showOverlay?.(model); } },
+    scheduler: { request: callback => { frames.add(callback); return () => { frames.delete(callback); overrides.cancelFrame?.(); }; } },
     loadResources: () => resources.promise, waitForMinimumDisplay: () => minimum.promise,
     createSocket: () => { const socket = new Socket(); sockets.push(socket); return socket as unknown as WebSocket; },
     record: event => { evidence.push(event); overrides.record?.(event); },
@@ -176,3 +177,36 @@ test('kick data remains primary when closing its socket also fails', async () =>
   const errors = (h.failures[0] as { errors: unknown[] }).errors;
   assert.deepEqual(errors[0], data); assert.ok(errors.includes(cleanup));
 });
+
+test('pending frame cancellation retains its primary error when socket cleanup also fails', async () => {
+  const primary = new Error('pending frame cancel failed'), cleanup = new Error('socket close failed');
+  let armed = false;
+  const h = await setup({ cancelFrame: () => { if (armed) throw primary; } });
+  await h.ready(); await h.host.login();
+  armed = true; h.sockets[0]!.closeError = cleanup;
+  // The real login response schedules a Store frame, then showLobby flush cancels it.
+  h.sockets[0]!.push(fixture());
+  assert.equal(h.failures.length, 1);
+  const fault = h.failures[0] as { errors?: unknown[] };
+  assert.ok(fault.errors, 'primary and cleanup failures must both be retained');
+  assert.strictEqual(fault.errors[0], primary);
+  assert.ok(fault.errors.includes(cleanup));
+  assert.equal(h.host.getSnapshot().ready, false); assert.equal(h.frames.size, 0);
+  assert.equal(h.sockets[0]!.closes, 1);
+});
+
+test('fatal overlay observer failure retains the original Runtime error object', async () => {
+  const observer = new Error('fatal overlay observer failed');
+  let primary: Error | undefined;
+  const h = await setup({ showOverlay: model => {
+    if (model.kind === 'fatal') { primary = model.error; throw observer; }
+  } });
+  await h.ready();
+  h.sockets[0]!.push({ route: 'agent', rpc: 'unsupported_test_rpc', data: {} });
+  assert.ok(primary); assert.match(primary.message, /Unsupported platform rpc/);
+  assert.equal(h.failures.length, 1);
+  const fault = h.failures[0] as { errors?: unknown[] };
+  assert.ok(fault.errors, 'Runtime error and overlay observer error must both be retained');
+  assert.strictEqual(fault.errors[0], primary); assert.strictEqual(fault.errors[1], observer);
+  assert.equal(h.host.getSnapshot().ready, false); assert.equal(h.sockets[0]!.closes, 1);
+});