diff --git a/src/org/thoughtcrime/securesms/notifications/NotificationCenter.java b/src/org/thoughtcrime/securesms/notifications/NotificationCenter.java
index 38ae6a71f..4ca1a1ebd 100644
--- a/src/org/thoughtcrime/securesms/notifications/NotificationCenter.java
+++ b/src/org/thoughtcrime/securesms/notifications/NotificationCenter.java
@@ -483,16 +483,18 @@ public class NotificationCenter {
             // esp. older android are not that great at grouping
             notificationManager.notify(ID_MSG_OFFSET + chatId, builder.build());
 
-            // group notifications together in a summary
-            if (Build.VERSION.SDK_INT >= 23) {
+            // group notifications together in a summary, this is possible since SDK 24 (Android 7)
+            // https://developer.android.com/training/notify-user/group.html
+            // in theory, this won't be needed due to setGroup(), however, in practise, it is needed up to at least Android 10.
+            if (Build.VERSION.SDK_INT >= 24) {
                 NotificationCompat.Builder summary = new NotificationCompat.Builder(context, notificationChannel)
                         .setGroup(GRP_MSG)
                         .setGroupSummary(true)
                         .setSmallIcon(R.drawable.icon_notification)
                         .setColor(context.getResources().getColor(R.color.delta_primary))
                         .setCategory(NotificationCompat.CATEGORY_MESSAGE)
-                        .setContentTitle("summary title")
-                        .setContentText("summary text")
+                        .setContentTitle("Delta Chat") // content title would only be used on SDK <24
+                        .setContentText("New messages") // content text would only be used on SDK <24
                         .setContentIntent(getOpenChatlistIntent());
                 notificationManager.notify(ID_MSG_SUMMARY, summary.build());
             }