Bug report for cache_controller.class.php

1484	                // Bypass sitemap
1485	                if ( $this->main_instance->get_single_config( 'cf_bypass_sitemap', 0 ) > 0 && strcasecmp( $_SERVER['REQUEST_URI'], '/sitemap_index.xml' ) == 0 || preg_match( '/[a-zA-Z0-9]-sitemap.xml$/', $_SERVER['REQUEST_URI'] ) ) {
1486	                        Helpers::bypass_reason_header( 'Sitemap' );
1487	
1488	                        return true;
1489	                }

In the if statement, because && has precedence over ||, the code actually bypasses wp-sitemap.xml regardless of whether cf_bypass_sitemap is set. What’s needed here is

if ( $this->main_instance->get_single_config( 'cf_bypass_sitemap', 0 ) > 0 && ( strcasecmp( $_SERVER['REQUEST_URI'], '/sitemap_index.xml' ) == 0 || preg_match( '/[a-zA-Z0-9]-sitemap.xml$/', $_SERVER['REQUEST_URI'] ) ) ) {}