Version 4.6.0

applications/core/sources/Messenger/Conversation.php

@@ -317,7 +317,7 @@ class _Conversation extends \IPS\Content\Item
 	protected function processBeforeCreate( $values )
 	{
 		$this->maps = array();
-		$this->to_count = \count( $values['messenger_to'] );
+		$this->to_count = ( $values['messenger_to'] instanceof \IPS\Member ) ? 1 : \count( $values['messenger_to'] );
 
 		parent::processBeforeCreate( $values );
 	}