diff --git a/src/app/shared/notifications/notifications-board/notifications-board.component.ts b/src/app/shared/notifications/notifications-board/notifications-board.component.ts
index 20bf7175f6f..c6abb39f705 100644
--- a/src/app/shared/notifications/notifications-board/notifications-board.component.ts
+++ b/src/app/shared/notifications/notifications-board/notifications-board.component.ts
@@ -10,8 +10,6 @@ import {
 
 import { select, Store } from '@ngrx/store';
 import { BehaviorSubject, Subscription, take } from 'rxjs';
-import difference from 'lodash/difference';
-
 import { NotificationsService } from '../notifications.service';
 import { AppState } from '../../../app.reducer';
 import { notificationsStateSelector } from '../selectors';
@@ -23,6 +21,7 @@ import {
   AccessibilitySetting
 } from '../../../accessibility/accessibility-settings.service';
 import cloneDeep from 'lodash/cloneDeep';
+import differenceWith from 'lodash/differenceWith';
 
 @Component({
   selector: 'ds-notifications-board',
@@ -69,13 +68,13 @@ export class NotificationsBoardComponent implements OnInit, OnDestroy {
           this.notifications = [];
         } else if (state.length > this.notifications.length) {
           // Add
-          const newElem = difference(state, this.notifications);
+          const newElem = differenceWith(state, this.notifications, this.toCheck);
           newElem.forEach((notification) => {
             this.add(notification);
           });
         } else {
           // Remove
-          const delElem = difference(this.notifications, state);
+          const delElem = differenceWith(this.notifications, state, this.toCheck);
           delElem.forEach((notification) => {
             this.notifications = this.notifications.filter((item: INotification) => item.id !== notification.id);
 
@@ -117,16 +116,15 @@ export class NotificationsBoardComponent implements OnInit, OnDestroy {
   }
 
   private block(item: INotification): boolean {
-    const toCheck = item.html ? this.checkHtml : this.checkStandard;
     this.notifications.forEach((notification) => {
-      if (toCheck(notification, item)) {
+      if (this.toCheck(notification, item)) {
         return true;
       }
     });
 
     if (this.notifications.length > 0) {
       this.notifications.forEach((notification) => {
-        if (toCheck(notification, item)) {
+        if (this.toCheck(notification, item)) {
           return true;
         }
       });
@@ -138,9 +136,17 @@ export class NotificationsBoardComponent implements OnInit, OnDestroy {
     } else {
       return false;
     }
-    return toCheck(comp, item);
+    return this.toCheck(comp, item);
   }
 
+  private toCheck = (checker: INotification, item: INotification) => {
+    if (item.html) {
+      return this.checkHtml(checker, item);
+    } else {
+      return this.checkStandard(checker, item);
+    }
+  };
+
   private checkStandard(checker: INotification, item: INotification): boolean {
     return checker.type === item.type && checker.title === item.title && checker.content === item.content;
   }