Could you please check after adding the below code in your child theme’s functions.php file?
add_action( 'wp_footer', 'th_hide_back_to_cart_button' );
function th_hide_back_to_cart_button(){
if(is_checkout()){
?>
<script type="text/javascript">
(function($){
$('#action-next').click(function(){
setTimeout(function(){
if($('.thwmscf-accordion-label.active').hasClass('last')){
$('.thwmscf-cart-url').hide();
}
},100);
})
$('#action-prev').click(function(){
$('.thwmscf-cart-url').show();
})
$('#thwmscf-tabs').find('li.thwmscf-tab a').click(function(){
setTimeout(function(){
if($('.thwmscf-accordion-label.active').hasClass('last')){
$('.thwmscf-cart-url').hide();
} else {
$('.thwmscf-cart-url').show();
}
},100);
});
})(jQuery);
</script>
<?php
}
}
Thank you!