diff --git a/php/EE/Migration/Containers.php b/php/EE/Migration/Containers.php
index b00b94918..8c078e60d 100644
--- a/php/EE/Migration/Containers.php
+++ b/php/EE/Migration/Containers.php
@@ -312,8 +312,22 @@ public static function migrate_site_containers( $updated_images ) {
 
 			$ee_site_object = SiteContainers::get_site_object( $site['site_type'] );
 
+			// The support project's php shares the site's php alias, and nginx resolves it only at (re)load.
+			$reload_nginx = in_array( $site['site_type'], [ 'wp', 'php' ], true );
+
 			if ( $site['site_enabled'] ) {
 
+				if ( $reload_nginx ) {
+					// Undone last for this site: after the old containers are back and the support project is gone.
+					self::$rsp->add_step(
+						sprintf( 'reload-site-nginx-on-rollback-%s', $site['site_url'] ),
+						function () {},
+						'EE\Migration\SiteContainers::reload_site_nginx',
+						null,
+						[ $site['site_url'], $site['site_fs_path'] ]
+					);
+				}
+
 				/**
 				 * Enable support containers.
 				 */
@@ -332,6 +346,16 @@ public static function migrate_site_containers( $updated_images ) {
 					[ $site ],
 					[ $site, $ee_site_object ]
 				);
+
+				if ( $reload_nginx ) {
+					self::$rsp->add_step(
+						sprintf( 'reload-support-nginx-%s', $site['site_url'] ),
+						'EE\Migration\SiteContainers::reload_support_nginx',
+						null,
+						[ $site['site_url'], $site['site_fs_path'] ],
+						null
+					);
+				}
 			}
 
 			self::$rsp->add_step(
@@ -369,6 +393,16 @@ public static function migrate_site_containers( $updated_images ) {
 					[ $site['site_url'], $site['site_fs_path'] ],
 					[ $site['site_url'], $site['site_fs_path'] ]
 				);
+
+				if ( $reload_nginx ) {
+					self::$rsp->add_step(
+						sprintf( 'reload-site-nginx-%s', $site['site_url'] ),
+						'EE\Migration\SiteContainers::reload_site_nginx',
+						null,
+						[ $site['site_url'], $site['site_fs_path'] ],
+						null
+					);
+				}
 			}
 		}
 	}
diff --git a/php/EE/Migration/SiteContainers.php b/php/EE/Migration/SiteContainers.php
index f2b7e0e31..e3a9d3bea 100644
--- a/php/EE/Migration/SiteContainers.php
+++ b/php/EE/Migration/SiteContainers.php
@@ -223,6 +223,42 @@ public static function reload_nginx( $site_fs_path ) {
 		}
 	}
 
+	/**
+	 * Reload site's nginx after its support containers are removed, so it drops the support php's IP.
+	 * A failure only warns: the site works, nginx just keeps retrying the dead peer.
+	 *
+	 * @param string $site_url     Site URL.
+	 * @param string $site_fs_path Directory containing site's docker-compose.yml.
+	 */
+	public static function reload_site_nginx( $site_url, $site_fs_path ) {
+		EE::debug( sprintf( 'Start reloading nginx of %s', $site_url ) );
+
+		try {
+			self::reload_nginx( $site_fs_path );
+		} catch ( \Exception $e ) {
+			EE::warning( sprintf( 'Could not reload nginx of %1$s after recreating its containers. Some requests may take ~3 s until you run `ee site reload %1$s --nginx`.', $site_url ) );
+
+			return;
+		}
+
+		EE::debug( sprintf( 'Complete reloading nginx of %s', $site_url ) );
+	}
+
+	/**
+	 * Reload the support nginx after the site's containers are removed, so it drops the old php's IP.
+	 * Best effort: the support nginx only serves until the site's containers are back.
+	 *
+	 * @param string $site_url     Site URL.
+	 * @param string $site_fs_path Directory containing site's docker-compose.yml.
+	 */
+	public static function reload_support_nginx( $site_url, $site_fs_path ) {
+		$command = sprintf( "docker-compose --project-name=%s exec nginx sh -c 'nginx -t && nginx -s reload'", self::get_support_project_name( $site_url ) );
+
+		if ( ! chdir( $site_fs_path ) || ! EE::exec( $command ) ) {
+			EE::debug( sprintf( 'Could not reload support nginx of %s', $site_url ) );
+		}
+	}
+
 	/**
 	 * Function to reload site's php.
 	 *
@@ -262,8 +298,7 @@ public static function docker_compose_pull( $site_fs_path ) {
 	public static function enable_support_containers( $site_url, $site_fs_path ) {
 		EE::debug( sprintf( 'Start enabling containers for %s', $site_url ) );
 
-		$site_name    = str_replace( '.', '', $site_url );
-		$project_name = sprintf( 'update-ee-%s', $site_name );
+		$project_name = self::get_support_project_name( $site_url );
 
 		if ( ! chdir( $site_fs_path ) ) {
 			throw new \Exception( sprintf( '%s does not exist.', $site_fs_path ) );
@@ -288,8 +323,7 @@ public static function enable_support_containers( $site_url, $site_fs_path ) {
 	public static function disable_support_containers( $site_url, $site_fs_path ) {
 		EE::debug( sprintf( 'Start disabling support containers for %s', $site_url ) );
 
-		$site_name    = str_replace( '.', '', $site_url );
-		$project_name = sprintf( 'update-ee-%s', $site_name );
+		$project_name = self::get_support_project_name( $site_url );
 
 		if ( ! chdir( $site_fs_path ) ) {
 			throw new \Exception( sprintf( '%s does not exist.', $site_fs_path ) );
@@ -302,4 +336,15 @@ public static function disable_support_containers( $site_url, $site_fs_path ) {
 
 		EE::debug( sprintf( 'Complete disabling support containers for %s', $site_url ) );
 	}
+
+	/**
+	 * Compose project name of a site's support containers.
+	 *
+	 * @param string $site_url Site URL.
+	 *
+	 * @return string
+	 */
+	private static function get_support_project_name( $site_url ) {
+		return sprintf( 'update-ee-%s', str_replace( '.', '', $site_url ) );
+	}
 }