WordPress Multisite .htaccess bug on Nginx

nginx.conf

# MULTISITE CONFIGURATION
if ( $uri ~ "files" ) {
     rewrite ^/(?:.*/)?files/(.+) /wp-includes/ms-files.php?file=$1;
 }

 if (!-e $request_filename) {
    rewrite  ^/[_0-9a-zA-Z-]+(/wp-(content|admin|includes).*) $1 break;
    rewrite  ^/[_0-9a-zA-Z-]+(/.*\.php)$ $1 break;
}