diff --git a/src/app/core/services/checkout.service.spec.ts b/src/app/core/services/checkout.service.spec.ts
index ee3adb7..8bfede7 100644
--- a/src/app/core/services/checkout.service.spec.ts
+++ b/src/app/core/services/checkout.service.spec.ts
@@ -58,6 +58,27 @@ describe('CheckoutService', () => {
     expect(notifyAvailabilityChanged).toHaveBeenCalledOnce();
   });
 
+  it('waits for the expired cart refresh before refreshing catalog availability', async () => {
+    const catalogAvailabilityService = TestBed.inject(CatalogAvailabilityService);
+    const notifyAvailabilityChanged = vi.spyOn(
+      catalogAvailabilityService,
+      'notifyAvailabilityChanged',
+    );
+    const purchasePromise = service.startCheckout('desfile', { cart_id: 12 });
+    const request = httpMock.expectOne(`${environment.url}tenants/desfile/compras/start-checkout`);
+
+    request.flush(
+      {
+        code: 'stock_reservation.expired',
+        message: 'La reserva de stock venció.',
+      },
+      { status: 422, statusText: 'Unprocessable Entity' },
+    );
+
+    await expect(purchasePromise).rejects.toBeTruthy();
+    expect(notifyAvailabilityChanged).not.toHaveBeenCalled();
+  });
+
   it('preserves checkout timing fields when completing a purchase', async () => {
     const purchasePromise = service.completePurchase('desfile', 55);
     const request = httpMock.expectOne(`${environment.url}tenants/desfile/compras/55/complete`);
diff --git a/src/app/core/services/checkout.service.ts b/src/app/core/services/checkout.service.ts
index 70886d6..459f779 100644
--- a/src/app/core/services/checkout.service.ts
+++ b/src/app/core/services/checkout.service.ts
@@ -149,7 +149,10 @@ export class CheckoutService extends BaseApiService {
 
       return purchase;
     } catch (error) {
-      this.catalogAvailabilityService.notifyAvailabilityChanged();
+      const responseBody = (error as { error?: unknown } | null)?.error;
+      if (!isExpiredStockReservationResponse(responseBody)) {
+        this.catalogAvailabilityService.notifyAvailabilityChanged();
+      }
       throw error;
     }
   }