diff --git a/api/src/Storage/Tracking.php b/api/src/Storage/Tracking.php
index 47d3bf435d..234800ef6c 100644
--- a/api/src/Storage/Tracking.php
+++ b/api/src/Storage/Tracking.php
@@ -843,7 +843,7 @@ abstract class Tracking
 				$notification->set_reply_to($reply_to);
 				$notification->set_subject($subject);
 				$notification->set_links(array($link));
-				$notification->set_popupdata($link['app']??null, $link, $link['id']??null);
+				$notification->set_popupdata($link['app']??$this->app, $link, $link['id']??null);
 				if ($attachments && is_array($attachments))
 				{
 					$notification->set_attachments($attachments);