I checked the site and looks like this is an issue about which the plugin developer may have a better idea. All I see that we are outputting the post title in the file framework/functions/breadcrumbs.php file at line number 81. Here is the code –
$post_ids = get_post($postid);
$title = $post_ids->post_title;
and the title being returned is actually two – each belonging to different languages. The plugin developer probably would know why this is happening. The plugin may have a filter for the title which is causing this. Pls check with them and see if this detail helps them find the issue.