diff --git a/components/cart/actions.ts b/components/cart/actions.ts
index 45e1b6053..d7ebe366b 100644
--- a/components/cart/actions.ts
+++ b/components/cart/actions.ts
@@ -41,7 +41,7 @@ export const addItem = async (variantId: string | undefined): Promise<Error | un
       quantity = itemInCart.quantity + 1;
     }
 
-    apiClient.invoke('addLineItem post /checkout/cart/line-item', {
+    await apiClient.invoke('addLineItem post /checkout/cart/line-item', {
       items: [
         {
           id: variantId,
diff --git a/lib/shopware/transform.ts b/lib/shopware/transform.ts
index 8d30d2a19..9fc825980 100644
--- a/lib/shopware/transform.ts
+++ b/lib/shopware/transform.ts
@@ -354,10 +354,19 @@ export function transformCart(resCart: ExtendedCart): Cart {
     id: resCart.token ?? '',
     lines:
       resCart.lineItems?.map((lineItem: ExtendedLineItem) => transformLineItem(lineItem)) || [],
-    totalQuantity: resCart.lineItems?.length || 0
+    totalQuantity: resCart.lineItems ? calculateTotalCartQuantity(resCart.lineItems) : 0
   };
 }
 
+function calculateTotalCartQuantity(lineItems: ExtendedLineItem[]) {
+  let totalQuantity = 0;
+  lineItems.forEach((lineItem) => {
+    totalQuantity += lineItem.quantity ?? 0;
+  });
+
+  return totalQuantity;
+}
+
 function transformLineItem(resLineItem: ExtendedLineItem): CartItem {
   return {
     id: resLineItem.id || '',