diff --git a/lib/services/notifications/notification-registry.ts b/lib/services/notifications/notification-registry.ts
index 31f97c9..eb0c2fb 100644
--- a/lib/services/notifications/notification-registry.ts
+++ b/lib/services/notifications/notification-registry.ts
@@ -207,8 +207,9 @@ export class NotificationRegistry {
             let timestamp: Date;
             if (typeof item.timestamp === 'string') {
               timestamp = new Date(item.timestamp);
-            } else if (item.timestamp instanceof Date) {
-              timestamp = item.timestamp;
+            } else if (item.timestamp && typeof item.timestamp === 'object' && 'getTime' in item.timestamp) {
+              // Handle Date object (from JSON.parse)
+              timestamp = new Date(item.timestamp as any);
             } else {
               timestamp = new Date(); // Fallback to now
             }