diff --git a/webapp/components/NotificationMenu/NotificationMenu.vue b/webapp/components/NotificationMenu/NotificationMenu.vue
index a8609f582..72f539a42 100644
--- a/webapp/components/NotificationMenu/NotificationMenu.vue
+++ b/webapp/components/NotificationMenu/NotificationMenu.vue
@@ -149,7 +149,7 @@ export default {
           return {
             notifications: unionBy(
               [newNotification],
-              previousResult.notifications,
+              previousResult?.notifications,
               (notification) => notification.id,
             ).sort((a, b) => new Date(b.updatedAt) - new Date(a.updatedAt)),
           }
diff --git a/webapp/graphql/PostMutations.js b/webapp/graphql/PostMutations.js
index c3a9369c3..73e9f8ebe 100644
--- a/webapp/graphql/PostMutations.js
+++ b/webapp/graphql/PostMutations.js
@@ -39,6 +39,7 @@ export default () => {
           deleted
           postType
           author {
+            id
             name
           }
           categories {