diff --git a/App.tsx b/App.tsx
index bdd4991..4d444f6 100644
--- a/App.tsx
+++ b/App.tsx
@@ -212,6 +212,7 @@ const App: React.FC = () => {
       sku: [],
       title: [],
       week: [],
+      stock: [],
     });
   };
 
diff --git a/services/dataProcessor.ts b/services/dataProcessor.ts
index f0c48cc..19a4c57 100644
--- a/services/dataProcessor.ts
+++ b/services/dataProcessor.ts
@@ -703,7 +703,7 @@ export const mergeSalesAndAdsData = (
 
 // Helper to check stock filter
 const checkStockFilter = (sku: string, filters: string[], stockMap?: Map<string, number>): boolean => {
-    if (!filters || filters.length === 0) return true;
+    if (!filters || !Array.isArray(filters) || filters.length === 0) return true;
     if (!stockMap) return true;
 
     // Normalize SKU (remove DE/EN) to match stock map