Cannot delete pipe with “Delete” link on All Pipes page

When hitting the link Delete on the All Pipes page overview, the pipe does not get deleted. With WP_DEBUG on, I get this error: Warning: array_map(): Argument #2 should be an array in /var/www/XXXXXXX/htdocs/wp-content/plugins/wp-pipes/controllers/pipes.php on line 29

Through the Bulk Action (checkbox + select Delete + Apply) deletion works fine.