diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 2f4f1444aa..9b6dd4d1a6 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -608,7 +608,7 @@ class Processor
 	private static function processContent($activity, $item)
 	{
 		if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
-			$item['title'] = Markdown::toBBCode($activity['name']);
+			$item['title'] = strip_tags($activity['name']);
 			$content = Markdown::toBBCode($activity['content']);
 		} elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
 			$item['title'] = $activity['name'];
@@ -619,6 +619,8 @@ class Processor
 			$content = HTML::toBBCode($activity['content']);
 		}
 
+		$item['title'] = trim(BBCode::toPlaintext($item['title']));
+
 		if (!empty($activity['languages'])) {
 			$item['language'] = self::processLanguages($activity['languages']);
 		}