diff --git a/include/enotify.php b/include/enotify.php
index d77ab448af..7eae51a0b5 100644
--- a/include/enotify.php
+++ b/include/enotify.php
@@ -605,7 +605,10 @@ function notification_store_and_send($params, $sitelink, $tsitelink, $hsitelink,
 
 function notification_from_array(array $notification)
 {
+	Logger::info('Start', ['uid' => $notification['uid'], 'id' => $notification['id'], 'type' => $notification['type']]);
+
 	if ($notification['type'] == Post\UserNotification::NOTIF_NONE) {
+		Logger::info('Not an item based notification, quitting', ['uid' => $notification['uid'], 'id' => $notification['id'], 'type' => $notification['type']]);
 		return false;
 	}
 
@@ -636,6 +639,7 @@ function notification_from_array(array $notification)
 		['uid' => [0, $notification['uid']], 'uri-id' => $notification['target-uri-id'], 'deleted' => false],
 		['order' => ['uid' => true]]);
 	if (empty($item)) {
+		Logger::info('Item not found', ['uri-id' => $notification['target-uri-id'], 'type' => $notification['type']]);
 		return false;
 	}
 
@@ -646,15 +650,16 @@ function notification_from_array(array $notification)
 	$subjectPrefix = $l10n->t('[Friendica:Notify]');
 
 	if (Post\ThreadUser::getIgnored($notification['parent-uri-id'], $notification['uid'])) {
-		Logger::info('Thread is ignored', ['parent-uri-id' => $notification['parent-uri-id']]);
+		Logger::info('Thread is ignored', ['parent-uri-id' => $notification['parent-uri-id'], 'type' => $notification['type']]);
 		return false;
 	}
 
 	// Check to see if there was already a tag notify or comment notify for this post.
 	// If so don't create a second notification
 	$condition = ['type' => [Notification\Type::TAG_SELF, Notification\Type::COMMENT, Notification\Type::SHARE],
-		'link' => $params['link'], 'uid' => $notification['uid']];
+		'link' => $params['link'], 'verb' => Activity::POST, 'uid' => $notification['uid']];
 	if (DBA::exists('notify', $condition)) {
+		Logger::info('Duplicate found, quitting', $condition);
 		return false;
 	}
 
@@ -682,6 +687,7 @@ function notification_from_array(array $notification)
 
 	$msg = Notification::getMessage($notification);
 	if (empty($msg)) {
+		Logger::info('No notification message, quitting', ['uid' => $notification['uid'], 'id' => $notification['id'], 'type' => $notification['type']]);
 		return false;
 	}
 
@@ -696,6 +702,8 @@ function notification_from_array(array $notification)
 	$hsitelink = sprintf($sitelink, '<a href="' . $siteurl . '">' . $sitename . '</a>');
 	$itemlink  = $params['link'];
 
+	Logger::info('Perform notification', ['uid' => $notification['uid'], 'id' => $notification['id'], 'type' => $notification['type']]);
+
 	return notification_store_and_send($params, $sitelink, $tsitelink, $hsitelink, $title, $subject, $preamble, $epreamble, $item['body'], $itemlink, true);
 }
 
diff --git a/mod/ping.php b/mod/ping.php
index bdd30be3fc..8a74f852c2 100644
--- a/mod/ping.php
+++ b/mod/ping.php
@@ -462,10 +462,10 @@ function ping_get_notifications($uid)
 				&& empty($result[$notification['parent']])
 			) {
 				// Should we condense the notifications or show them all?
-				if (DI::pConfig()->get(local_user(), 'system', 'detailed_notif')) {
-					$result[$notification["id"]] = $notification;
+				if (($notification['verb'] != Activity::POST) || DI::pConfig()->get(local_user(), 'system', 'detailed_notif')) {
+					$result[] = $notification;
 				} else {
-					$result[$notification['parent']] = $notification;
+					$result['p:' . $notification['parent']] = $notification;
 				}
 			}
 		}
diff --git a/src/Model/Notification.php b/src/Model/Notification.php
index 2a730c5db1..1df420845c 100644
--- a/src/Model/Notification.php
+++ b/src/Model/Notification.php
@@ -222,10 +222,17 @@ class Notification extends BaseModel
 				}
 			}
 
-			if (($notification['type'] == Post\UserNotification::NOTIF_SHARED) && !empty($item['causer-id'])) {
-				$causer = Contact::getById($item['causer-id'], ['id', 'name', 'url']);
+			if ($item['owner-id'] != $item['author-id']) {
+				$cid = $item['owner-id'];
+			}
+			if (!empty($item['causer-id']) && ($item['causer-id'] != $item['author-id'])) {
+				$cid = $item['causer-id'];
+			}
+
+			if (($notification['type'] == Post\UserNotification::NOTIF_SHARED) && !empty($cid)) {
+				$causer = Contact::getById($cid, ['id', 'name', 'url']);
 				if (empty($contact)) {
-					Logger::info('Causer not found', ['causer' => $item['causer-id']]);
+					Logger::info('Causer not found', ['causer' => $cid]);
 					return $message;
 				}
 			} elseif (in_array($notification['type'], [Post\UserNotification::NOTIF_COMMENT_PARTICIPATION, Post\UserNotification::NOTIF_ACTIVITY_PARTICIPATION])) {