diff --git a/frontend/src/utils/form/communication-recipients.js b/frontend/src/utils/form/communication-recipients.js
index cf28715eb..7848a5736 100644
--- a/frontend/src/utils/form/communication-recipients.js
+++ b/frontend/src/utils/form/communication-recipients.js
@@ -29,8 +29,7 @@ export class CommunicationRecipients {
 
     this.setupRecipientCategories();
 
-    const recipientObserver = new MutationObserver(this.setupRecipientCategories.bind(this));
-    recipientObserver.observe(this.massInputElement, { childList: true });
+    this._eventManager.registerNewMutationObserver(this.setupRecipientCategories.bind(this), this.massInputElement, { childList: true });
   }
 
   setupRecipientCategories() {
@@ -46,6 +45,7 @@ export class CommunicationRecipients {
 
   destroy() {
     this._eventManager.removeAllEventListenersFromUtil();
+    this._eventManager.removeAllObserversFromUtil();
     this.removeCheckedCounter();
   }
 }