diff --git a/.changeset/small-wombats-know.md b/.changeset/small-wombats-know.md
new file mode 100644
index 000000000000..ca826a1aab4b
--- /dev/null
+++ b/.changeset/small-wombats-know.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+fix miss a head when the templaterender has a promise
diff --git a/packages/astro/src/runtime/server/render/astro/instance.ts b/packages/astro/src/runtime/server/render/astro/instance.ts
index ed5044575ae5..abfcd94e89eb 100644
--- a/packages/astro/src/runtime/server/render/astro/instance.ts
+++ b/packages/astro/src/runtime/server/render/astro/instance.ts
@@ -50,6 +50,9 @@ export class AstroComponentInstance {
 			value = await value;
 		}
 		if (isHeadAndContent(value)) {
+			if (this.result.extraHead.length === 0 && value.head) {
+				yield renderChild(value.head);
+			}
 			yield* value.content;
 		} else {
 			yield* renderChild(value);
diff --git a/packages/integrations/mdx/test/astro-content-css.test.js b/packages/integrations/mdx/test/astro-content-css.test.js
new file mode 100644
index 000000000000..7168795cdeb7
--- /dev/null
+++ b/packages/integrations/mdx/test/astro-content-css.test.js
@@ -0,0 +1,46 @@
+import { expect } from 'chai';
+import * as cheerio from 'cheerio';
+import { loadFixture } from '../../../astro/test/test-utils.js';
+import mdx from '@astrojs/mdx';
+
+describe('build css from the component', async () => {
+	let fixture;
+
+	before(async () => {
+		fixture = await loadFixture({ root: new URL('./fixtures/astro-content-css/', import.meta.url),integrations: [mdx()], });
+		await fixture.build();
+	});
+
+	describe('Build', () => {
+		before(async () => {
+			await fixture.build();
+		});
+
+		it('including css and js from the component in pro', async () => {
+			const html = await fixture.readFile('/index.html');
+			const $ = cheerio.load(html);
+			expect($('link[href$=".css"]').attr('href')).to.match(/^\/_astro\//);
+			expect($('script[src$=".js"]').attr('src')).to.match(/^\/_astro\//);
+		});
+	})
+
+	describe('Dev', () => {
+		let devServer
+		before(async () => {
+			devServer = await fixture.startDevServer();
+		});
+
+		after(async () => {
+			devServer.stop();
+		});
+
+		it('ncluding css and js from the component in Dev', async () => {
+			let res = await fixture.fetch(`/`);
+			expect(res.status).to.equal(200);
+			const html = await res.text();
+			const $ = cheerio.load(html);
+			expect($.html()).to.include('CornflowerBlue');
+			expect($('script[src$=".js"]').attr('src')).to.include('astro');
+		});
+	})
+})
diff --git a/packages/integrations/mdx/test/fixtures/astro-content-css/astro.config.mjs b/packages/integrations/mdx/test/fixtures/astro-content-css/astro.config.mjs
new file mode 100644
index 000000000000..b67da09a917e
--- /dev/null
+++ b/packages/integrations/mdx/test/fixtures/astro-content-css/astro.config.mjs
@@ -0,0 +1,11 @@
+import { defineConfig } from 'astro/config';
+
+import mdx from "@astrojs/mdx";
+
+// https://astro.build/config
+export default defineConfig({
+  build: {
+    format: 'file'
+  },
+  integrations: [mdx()]
+});
diff --git a/packages/integrations/mdx/test/fixtures/astro-content-css/package.json b/packages/integrations/mdx/test/fixtures/astro-content-css/package.json
new file mode 100644
index 000000000000..8d436998c640
--- /dev/null
+++ b/packages/integrations/mdx/test/fixtures/astro-content-css/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "@test/astro-content-css",
+  "version": "0.0.0",
+  "private": true,
+  "dependencies": {
+    "astro": "workspace:*",
+    "@astrojs/mdx": "workspace:*"
+  }
+}
diff --git a/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/config.ts b/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/config.ts
new file mode 100644
index 000000000000..bf1a34c0528f
--- /dev/null
+++ b/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/config.ts
@@ -0,0 +1,12 @@
+// 1. Import utilities from `astro:content`
+import { z, defineCollection } from 'astro:content';
+// 2. Define a schema for each collection you'd like to validate.
+const dynamicCollection = defineCollection({
+  schema: z.object({
+    title: z.string(),
+  }),
+});
+// 3. Export a single `collections` object to register your collection(s)
+export const collections = {
+  dynamic: dynamicCollection,
+};
diff --git a/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/dynamic/FirstComponentWithJS.astro b/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/dynamic/FirstComponentWithJS.astro
new file mode 100644
index 000000000000..f3b588b42713
--- /dev/null
+++ b/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/dynamic/FirstComponentWithJS.astro
@@ -0,0 +1,18 @@
+---
+const { text } = Astro.props;
+---
+<!DOCTYPE html>
+<html lang="en">
+	<head><meta charset="utf-8" /></head>
+	<body>
+    <div id="first">1st components with js. Props: {text}. <span>Styles</span>. JS: </div>
+	</body>
+</html>
+<script>
+  document.querySelector('#first').innerHTML += 'works';
+</script>
+<style>
+  #first > span {
+    color: CornflowerBlue;
+  }
+</style>
\ No newline at end of file
diff --git a/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/dynamic/first-component-with-js.mdx b/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/dynamic/first-component-with-js.mdx
new file mode 100644
index 000000000000..0abdfbe3a4f8
--- /dev/null
+++ b/packages/integrations/mdx/test/fixtures/astro-content-css/src/content/dynamic/first-component-with-js.mdx
@@ -0,0 +1,9 @@
+---
+title: 'First component'
+---
+
+import FirstDynamicComponentWithJS from './FirstComponentWithJS.astro';
+
+<FirstDynamicComponentWithJS text={props.mdProps} />
+
+Additional text from mdx 'first-component-with-js'
diff --git a/packages/integrations/mdx/test/fixtures/astro-content-css/src/pages/index.astro b/packages/integrations/mdx/test/fixtures/astro-content-css/src/pages/index.astro
new file mode 100644
index 000000000000..63ea9ddbb41b
--- /dev/null
+++ b/packages/integrations/mdx/test/fixtures/astro-content-css/src/pages/index.astro
@@ -0,0 +1,16 @@
+---
+import { getCollection } from 'astro:content';
+
+const entries = await getCollection('dynamic');
+---
+
+<!DOCTYPE html>
+<html lang="en">
+  <head><meta charset="utf-8" /></head>
+	<body>
+		{entries.map(async entry => {
+			const { Content } = await entry.render();
+			return <Content mdProps="work" />; 
+		})}
+	</body>
+</html>
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 635c51a2f190..54421c429356 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -4244,6 +4244,15 @@ importers:
         specifier: ^4.3.1
         version: 4.3.1(@types/node@18.16.3)(sass@1.52.2)
 
+  packages/integrations/mdx/test/fixtures/astro-content-css:
+    dependencies:
+      '@astrojs/mdx':
+        specifier: workspace:*
+        version: link:../../..
+      astro:
+        specifier: workspace:*
+        version: link:../../../../../astro
+
   packages/integrations/mdx/test/fixtures/css-head-mdx:
     dependencies:
       '@astrojs/mdx':