Problem with QueryBuilder pagination for a full text search

Hi all, I'm trying to implement a full text search for my site, but I have some problem with the QueryBuilder.

That's my search function:

<?php  
    protected function search($language, $q = null, $params)  
    {  

        $builder = new QueryBuilder();

        $builder->columns([
                "id",
                "itemId",
                "title",
                "permalink" => sprintf("CONCAT('//%s/%s/',slug)", $_SERVER['HTTP_HOST'], $language, $language)
            ])
            ->from("App\Models\Ingested")
            ->where(
                "language=:language: AND MATCH(searchable) AGAINST (:q: IN BOOLEAN MODE)",
                [
                    "language" => $language,
                    "q"   => $q."*",
                ]
            );

        $paginator = new PQueryBuilder(
            [
                "builder" => $builder,
                "limit"   => $params['limit'],
                "page"    => $params['page'],
            ]
        );

        return $paginator->getPaginate();
    }  

This return me an error:

Syntax error, unexpected token IDENTIFIER(BOOLEAN), near to ' MODE) LIMIT :APL0:', when parsing: SELECT id, itemId, title, CONCAT('//www.weekendinitaly.lo/it/',slug) AS [permalink] FROM [App\Models\Wizardry] WHERE language=:language: AND MATCH(searchable) AGAINST (:q: IN BOOLEAN MODE) LIMIT :APL0: (201)
#0 [internal function]: Phalcon\Mvc\Model\Query->parse()
#1 [internal function]: Phalcon\Mvc\Model\Query->execute()
#2 /var/www/BraveNewSystem/app/api/controllers/WizardryController.php(78): Phalcon\Paginator\Adapter\QueryBuilder->getPaginate()
#3 /var/www/BraveNewSystem/app/api/controllers/WizardryController.php(35): App\Api\Controllers\WizardryController->search('it', 'firen', Array)

Maybe it's a bug, isn't it?