Search doesn't work with group permissions

[ghost]

I noticed this behaviour:

I've a single user associated to many groups and all faqs are associated to groups. If I make a search (obviously after login) I doesn't get any faq.

I see in phpmyfaq/inc/PMF/Search/Resultset.php in function reviewResultset(Array $resultSet) that all results are reviewed basing on permissions. The first review is based on group permission and after there is this if statement:

// check permission for user
if ($permission || 'basic' === $this->_config->get('security.permLevel')) { ... }

The question is: if $permission is true (for user's group) why the faq will be reviewed on user's permission?