diff --git a/lib/Activity/ActivityManager.php b/lib/Activity/ActivityManager.php
index f3a0c3489..e90aa61b0 100644
--- a/lib/Activity/ActivityManager.php
+++ b/lib/Activity/ActivityManager.php
@@ -357,7 +357,7 @@ class ActivityManager {
 			case self::SUBJECT_LABEL_UNASSING:
 			case self::SUBJECT_CARD_USER_ASSIGN:
 			case self::SUBJECT_CARD_USER_UNASSIGN:
-				$subjectParams = $this->findDetailsForCard($entity->getId());
+				$subjectParams = $this->findDetailsForCard($entity->getId(), $subject);
 				$object = $entity;
 				break;
 			case self::SUBJECT_ATTACHMENT_CREATE:
@@ -493,10 +493,17 @@ class ActivityManager {
 		];
 	}
 
-	private function findDetailsForCard($cardId) {
+	private function findDetailsForCard($cardId, $subject = null) {
 		$card = $this->cardMapper->find($cardId);
 		$stack = $this->stackMapper->find($card->getStackId());
 		$board = $this->boardMapper->find($stack->getBoardId());
+		if ($subject !== self::SUBJECT_CARD_UPDATE_DESCRIPTION) {
+			$card = [
+				'id' => $card->getId(),
+				'title' => $card->getTitle(),
+				'archived' => $card->getArchived()
+			];
+		}
 		return [
 			'card' => $card,
 			'stack' => $stack,
diff --git a/tests/unit/Activity/ActivityManagerTest.php b/tests/unit/Activity/ActivityManagerTest.php
index 8bcf3884e..7d6b515ea 100644
--- a/tests/unit/Activity/ActivityManagerTest.php
+++ b/tests/unit/Activity/ActivityManagerTest.php
@@ -295,7 +295,11 @@ class ActivityManagerTest extends TestCase {
 		$this->assertEquals([
 			'stack' => $stack,
 			'board' => $board,
-			'card' => $card
+			'card' => [
+				'id' => $card->getId(),
+				'title' => $card->getTitle(),
+				'archived' => $card->getArchived()
+			]
 		], $this->invokePrivate($this->activityManager, 'findDetailsForCard', [555]));
 	}
 
@@ -329,7 +333,11 @@ class ActivityManagerTest extends TestCase {
 		$this->assertEquals([
 			'stack' => $stack,
 			'board' => $board,
-			'card' => $card,
+			'card' => [
+				'id' => $card->getId(),
+				'title' => $card->getTitle(),
+				'archived' => $card->getArchived()
+			],
 			'attachment' => $attachment
 		], $this->invokePrivate($this->activityManager, 'findDetailsForAttachment', [777]));
 	}
diff --git a/tests/unit/Activity/FilterTest.php b/tests/unit/Activity/FilterTest.php
index d3e6b82c5..d58ad34b9 100644
--- a/tests/unit/Activity/FilterTest.php
+++ b/tests/unit/Activity/FilterTest.php
@@ -71,7 +71,7 @@ class FilterTest extends TestCase {
 
 	public function testFilterTypes() {
 		$data = ['deck_board', 'deck_card'];
-		$this->assertEquals($data, $this->filter->filterTypes($data));
+		$this->assertEquals(array_merge($data, ['deck_comment']), $this->filter->filterTypes($data));
 	}
 
 	public function testAllowedApps() {