Remove “Home” from home page title

Guys I’m having an issue with the home page title of my wordpress blog after i updated the wordpress to 4.4. I’m not sure if its because of the update. The issue is, I’m getting “Home” prefix for the home page title. Here’s my website – https://www.autodevot.com

In the wordpress Settings > General, in the Site Title section, I’ve written Autodevot. And in the Tagline section, I’ve written Automotive World News | Car News and Reviews | Upcoming Cars in India. So earlier, this tagline section was appearing in the home page title. Now for some reason, Its adding “Home” prefix for the home page title. So now the title comes as Home – Autodevot. I need to get rid of that “Home” and want the tagline section to appear in the title like before. Title for rest of the pages are appearing fine. Problem is only with the home page title. I opened the header.php and the code is like this

<?php
if ( ! function_exists( '_wp_render_title_tag' ) ) {
function theme_slug_render_title() {
?>
<title><?php wp_title( '|', true, 'right' ); ?></title>
<?php
}
add_action( 'wp_head', 'theme_slug_render_title' );
}
?>

Any help?