diff --git a/lib/Activity/ActivityManager.php b/lib/Activity/ActivityManager.php
index 881c55cf2..ebecf0df6 100644
--- a/lib/Activity/ActivityManager.php
+++ b/lib/Activity/ActivityManager.php
@@ -377,6 +377,9 @@ class ActivityManager {
 			$subjectParams['stackBefore'] = $this->stackMapper->find($additionalParams['before']);
 		}
 
+		$subjectParams['author'] = $this->userId;
+
+
 		$event = $this->manager->generateEvent();
 		$event->setApp('deck')
 			->setType('deck')
diff --git a/lib/Activity/DeckProvider.php b/lib/Activity/DeckProvider.php
index 83f689955..c99bbe468 100644
--- a/lib/Activity/DeckProvider.php
+++ b/lib/Activity/DeckProvider.php
@@ -81,6 +81,11 @@ class DeckProvider implements IProvider {
 		 */
 
 		$author = $event->getAuthor();
+		// get author if
+		if ($author === '' && array_key_exists('author', $subjectParams)) {
+			$author = $subjectParams['author'];
+			unset($subjectParams['author']);
+		}
 		$user = $this->userManager->get($author);
 		$params = [
 			'user' => [
@@ -90,6 +95,9 @@ class DeckProvider implements IProvider {
 			],
 		];
 		if ($event->getObjectType() === ActivityManager::DECK_OBJECT_BOARD) {
+			if ($event->getObjectName() === '') {
+				$event->setObject($event->getObjectType(), $event->getObjectId(), $subjectParams['board']['title']);
+			}
 			$board = [
 				'type' => 'highlight',
 				'id' => $event->getObjectId(),
@@ -100,6 +108,9 @@ class DeckProvider implements IProvider {
 		}
 
 		if ($event->getObjectType() === ActivityManager::DECK_OBJECT_CARD) {
+			if ($event->getObjectName() === '') {
+				$event->setObject($event->getObjectType(), $event->getObjectId(), $subjectParams['card']['title']);
+			}
 			$card = [
 				'type' => 'highlight',
 				'id' => $event->getObjectId(),
@@ -149,6 +160,7 @@ class DeckProvider implements IProvider {
 
 		$event->setParsedSubject(str_replace($placeholders, $replacements, $subject))
 			->setRichSubject($subject, $parameters);
+		$event->setSubject($subject, $parameters);
 	}
 
 	private function getIcon(IEvent $event) {
@@ -301,6 +313,6 @@ class DeckProvider implements IProvider {
 	}
 
 	public function deckUrl($endpoint) {
-		return $this->urlGenerator->linkToRoute('deck.page.index') . '#!' . $endpoint;
+		return $this->urlGenerator->linkToRouteAbsolute('deck.page.index') . '#!' . $endpoint;
 	}
 }
diff --git a/tests/unit/Activity/CommentEventHandlerTest.php b/tests/unit/Activity/CommentEventHandlerTest.php
index 1e149f528..5a0b3902a 100644
--- a/tests/unit/Activity/CommentEventHandlerTest.php
+++ b/tests/unit/Activity/CommentEventHandlerTest.php
@@ -53,13 +53,17 @@ class CommentEventHandlerTest extends TestCase {
 	private $activityManager;
 	/** @var NotificationHelper */
 	private $notificationHelper;
+	/** @var CardMapper */
+	private $cardMapper;
 
 	public function setUp() {
 		$this->activityManager = $this->createMock(ActivityManager::class);
 		$this->notificationHelper = $this->createMock(NotificationHelper::class);
+		$this->cardMapper = $this->createMock(CardMapper::class);
 		$this->commentEventHandler = new CommentEventHandler(
 			$this->activityManager,
-			$this->notificationHelper
+			$this->notificationHelper,
+			$this->cardMapper
 		);
 	}
 
@@ -67,10 +71,15 @@ class CommentEventHandlerTest extends TestCase {
 		$comment = $this->createMock(IComment::class);
 		$comment->expects($this->any())->method('getId')->willReturn(1);
 		$comment->expects($this->any())->method('getObjectType')->willReturn('deckCard');
+		$comment->expects($this->any())->method('getMessage')->willReturn('Hello world');
+		$card = $this->createMock(Card::class);
+		$this->cardMapper->expects($this->once())
+			->method('find')
+			->willReturn($card);
 		$commentsEvent = new CommentsEvent(CommentsEvent::EVENT_ADD, $comment);
 		$this->activityManager->expects($this->once())
 			->method('triggerEvent')
-			->with(ActivityManager::DECK_OBJECT_CARD, $comment, ActivityManager::SUBJECT_CARD_COMMENT_CREATE, ['comment' => 1]);
+			->with(ActivityManager::DECK_OBJECT_CARD, $card, ActivityManager::SUBJECT_CARD_COMMENT_CREATE, ['comment' => $comment]);
 		$this->notificationHelper->expects($this->once())
 			->method('sendMention')
 			->with($comment);
diff --git a/tests/unit/Activity/DeckProviderTest.php b/tests/unit/Activity/DeckProviderTest.php
index 657dd01d5..2c405ff1f 100644
--- a/tests/unit/Activity/DeckProviderTest.php
+++ b/tests/unit/Activity/DeckProviderTest.php
@@ -139,7 +139,7 @@ class DeckProviderTest extends TestCase {
 
 	public function testDeckUrl() {
 		$this->urlGenerator->expects($this->once())
-			->method('linkToRoute')
+			->method('linkToRouteAbsolute')
 			->with('deck.page.index')
 			->willReturn('http://localhost/index.php/apps/deck/');
 		$this->assertEquals(