diff --git a/src/notifications.js b/src/notifications.js
index d06108e8ca..e38ccd215f 100644
--- a/src/notifications.js
+++ b/src/notifications.js
@@ -519,7 +519,9 @@ Notifications.merge = async function (notifications) {
 
 		differentiators.forEach((differentiator) => {
 			function typeFromLength(items) {
-				if (items.length === 2) {
+				if (items.length <= 1) {
+					return '';
+				} else if (items.length === 2) {
 					return 'dual';
 				} else if (items.length === 3) {
 					return 'triple';
@@ -553,7 +555,7 @@ Notifications.merge = async function (notifications) {
 					const type = typeFromLength(usernames);
 					const isMultiple = type === 'multiple';
 					const txArgs = [
-						`${mergeId}-${type}`,
+						`${mergeId}${type ? '-type' : ''}`,
 						...usernames.slice(0, usernames.length <= 3 ? 3 : 2),
 						...(isMultiple ? [usernames.length - 2] : []),
 						notifObj.roomIcon,
@@ -574,7 +576,7 @@ Notifications.merge = async function (notifications) {
 					const type = typeFromLength(usernames);
 					const isMultiple = type === 'multiple';
 					const txArgs = [
-						`${mergeId}-${type}`,
+						`${mergeId}${type ? '-type' : ''}`,
 						...usernames.slice(0, usernames.length <= 3 ? 3 : 2),
 						...(isMultiple ? [usernames.length - 2] : []),
 						utils.decodeHTMLEntities(notifObj.topicTitle || ''),