Shortcode Not Working in Slider When Added To Post Title

I've coded a shortcode to add manually to specific post title fields so i can style part of a title

add_shortcode( 'green', 'green_shortcode' );
function green_shortcode( $atts, $content = 0 ) {

    $a = shortcode_atts( array(
        'class' = 'green',
    ), $atts );

    return 'span class=' . $a['class'] . '' . $content . '/span';
}

This works on the single post titles but doesn't parse the shortcode when pulling the title into a slider.

This is the messed up HTML output from the slider

h2a href=http://newlocal.local/this-is-a-featured-post-4/ title=This  is a Featured Post #4This span class=green is a Featured Post #4/span/a/h2

Here's a visual

I have added do_shortcode to the post title PHP but it doesn't fix the problem

do_shortcode( get_the_title() );

The slider uses a WP_Query

new WP_Query( $query_args );

printf( 'h2a href=%s title=%s%s/a/h2', get_permalink(), the_title_attribute( 'echo=0' ), get_the_title() );

Edit : This is whats added to functions.php to parse shortcodes in the post title. Works in single post titles but NOT when the post title is shown in a slider.

add_filter( 'the_title', 'do_shortcode' );