WP Query with Tax Query – OrderBy don't work

I’m trying to keep my posts sorted by date in a wp_query with tax_query, but unfortunately the posts are not showing organized by date, this is my query:

$args = array(
            'post_type' => 'myCPT',
            'posts_per_page' => '-1',
            'tax_query' => array(
                array(
                    'taxonomy' => 'category-page',
                    'field'    => 'slug',
                    'terms'    => 'MyTerm',
                ),
            ),
            'orderby' => 'date',
            'order' => 'ASC',
        );

Any idea?