Truncate Yoast Breadcrumb Titles

functions.php

<?php

//Truncate Breadcrumb title

function truncate_breadcrumb_title() {
	// Get the title of the current post.
	if(WPSEO_Meta::get_value( 'bctitle', get_the_ID())){
		$title = WPSEO_Meta::get_value( 'bctitle', get_the_ID());
	}else{
		$title = get_the_title();
	}
	
	// Determine the length of the title.
	$title_length = strlen( $title );
	// Set a limit for the breadcrumb title.
	$limit = 25;
	// Truncate the title.
	$truncated = substr( $title, 0, $limit );
	// Add an ellipsis if the title has been truncated.
	if ( $title_length > $limit ) {
		$truncated .= '...';
	}
	$link['text'] = $truncated;
	return $link['text'];
}
add_filter('wp_seo_get_bc_title', 'truncate_breadcrumb_title');