diff --git a/CHANGELOG.md b/CHANGELOG.md
index c963cd2d5a..91eb8b4895 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -239,6 +239,7 @@ Notes: web developers are advised to use [`~` (tilde range)](https://github.com/
    - Migrated to radio button for like/dislike where form submission is required
 - Fixed long citation identifiers break activity layout, in PR [#5507](https://github.com/microsoft/BotFramework-WebChat/pull/5507), by [@OEvgeny](https://github.com/OEvgeny)
 - Updated file-based import with `.js` extension and removed the file extension from build config, by [@compulim](https://github.com/compulim), in PR [#5516](https://github.com/microsoft/BotFramework-WebChat/pull/5516)
+- Fixed [#5518](https://github.com/microsoft/BotFramework-WebChat/issues/5518). Minimal bundled build should work properly, in PR [#5507](https://github.com/microsoft/BotFramework-WebChat/pull/5507), by [@compulim](https://github.com/compulim)
 
 # Removed
 
diff --git a/__tests__/html2/basic/bundle/es5.html b/__tests__/html2/basic/bundle/es5.html
new file mode 100644
index 0000000000..05c8459cfe
--- /dev/null
+++ b/__tests__/html2/basic/bundle/es5.html
@@ -0,0 +1,53 @@
+<!doctype html>
+<html lang="en-US">
+  <head>
+    <link href="/assets/index.css" rel="stylesheet" type="text/css" />
+    <script crossorigin="anonymous" src="/test-harness.js"></script>
+    <script crossorigin="anonymous" src="/test-page-object.js"></script>
+    <script crossorigin="anonymous" src="/__dist__/webchat-es5.js"></script>
+  </head>
+  <body>
+    <main id="webchat"></main>
+    <script>
+      run(async function () {
+        const {
+          testHelpers: { createDirectLineEmulator }
+        } = window;
+
+        const { directLine, store } = createDirectLineEmulator();
+
+        WebChat.renderWebChat({ directLine, store }, document.getElementById('webchat'));
+
+        await pageConditions.uiConnected();
+
+        await directLine.emulateIncomingActivity({
+          from: {
+            id: 'bot',
+            role: 'bot'
+          },
+          text: 'Hello, World!',
+          type: 'message'
+        });
+
+        await pageConditions.numActivitiesShown(1);
+
+        await host.snapshot('local');
+
+        const metaMap = new Map(
+          Array.from(document.querySelectorAll('meta'))
+            .filter(element => element.name.startsWith('botframework-webchat'))
+            .map(element => [element.name, element.getAttribute('content')])
+        );
+
+        expect(metaMap.has('botframework-webchat:api')).toBe(true);
+        expect(metaMap.get('botframework-webchat:bundle:variant')).toBe('full-es5');
+        expect(metaMap.has('botframework-webchat:bundle:version')).toBe(true);
+        expect(metaMap.has('botframework-webchat:bundle')).toBe(true);
+        expect(metaMap.has('botframework-webchat:component')).toBe(true);
+        expect(metaMap.has('botframework-webchat:core:version')).toBe(true);
+        expect(metaMap.has('botframework-webchat:core')).toBe(true);
+        expect(metaMap.has('botframework-webchat:ui:version')).toBe(true);
+      });
+    </script>
+  </body>
+</html>
diff --git a/__tests__/html2/basic/bundle/es5.html.snap-1.png b/__tests__/html2/basic/bundle/es5.html.snap-1.png
new file mode 100644
index 0000000000..49d0068b80
Binary files /dev/null and b/__tests__/html2/basic/bundle/es5.html.snap-1.png differ
diff --git a/__tests__/html2/basic/bundle/full.html b/__tests__/html2/basic/bundle/full.html
new file mode 100644
index 0000000000..bd90acf69e
--- /dev/null
+++ b/__tests__/html2/basic/bundle/full.html
@@ -0,0 +1,53 @@
+<!doctype html>
+<html lang="en-US">
+  <head>
+    <link href="/assets/index.css" rel="stylesheet" type="text/css" />
+    <script crossorigin="anonymous" src="/test-harness.js"></script>
+    <script crossorigin="anonymous" src="/test-page-object.js"></script>
+    <script crossorigin="anonymous" src="/__dist__/webchat.js"></script>
+  </head>
+  <body>
+    <main id="webchat"></main>
+    <script>
+      run(async function () {
+        const {
+          testHelpers: { createDirectLineEmulator }
+        } = window;
+
+        const { directLine, store } = createDirectLineEmulator();
+
+        WebChat.renderWebChat({ directLine, store }, document.getElementById('webchat'));
+
+        await pageConditions.uiConnected();
+
+        await directLine.emulateIncomingActivity({
+          from: {
+            id: 'bot',
+            role: 'bot'
+          },
+          text: 'Hello, World!',
+          type: 'message'
+        });
+
+        await pageConditions.numActivitiesShown(1);
+
+        await host.snapshot('local');
+
+        const metaMap = new Map(
+          Array.from(document.querySelectorAll('meta'))
+            .filter(element => element.name.startsWith('botframework-webchat'))
+            .map(element => [element.name, element.getAttribute('content')])
+        );
+
+        expect(metaMap.has('botframework-webchat:api')).toBe(true);
+        expect(metaMap.get('botframework-webchat:bundle:variant')).toBe('full');
+        expect(metaMap.has('botframework-webchat:bundle:version')).toBe(true);
+        expect(metaMap.has('botframework-webchat:bundle')).toBe(true);
+        expect(metaMap.has('botframework-webchat:component')).toBe(true);
+        expect(metaMap.has('botframework-webchat:core:version')).toBe(true);
+        expect(metaMap.has('botframework-webchat:core')).toBe(true);
+        expect(metaMap.has('botframework-webchat:ui:version')).toBe(true);
+      });
+    </script>
+  </body>
+</html>
diff --git a/__tests__/html2/basic/bundle/full.html.snap-1.png b/__tests__/html2/basic/bundle/full.html.snap-1.png
new file mode 100644
index 0000000000..49d0068b80
Binary files /dev/null and b/__tests__/html2/basic/bundle/full.html.snap-1.png differ
diff --git a/__tests__/html2/basic/bundle/minimal.html b/__tests__/html2/basic/bundle/minimal.html
new file mode 100644
index 0000000000..db8f2fc217
--- /dev/null
+++ b/__tests__/html2/basic/bundle/minimal.html
@@ -0,0 +1,53 @@
+<!doctype html>
+<html lang="en-US">
+  <head>
+    <link href="/assets/index.css" rel="stylesheet" type="text/css" />
+    <script crossorigin="anonymous" src="/test-harness.js"></script>
+    <script crossorigin="anonymous" src="/test-page-object.js"></script>
+    <script crossorigin="anonymous" src="/__dist__/webchat-minimal.js"></script>
+  </head>
+  <body>
+    <main id="webchat"></main>
+    <script>
+      run(async function () {
+        const {
+          testHelpers: { createDirectLineEmulator }
+        } = window;
+
+        const { directLine, store } = createDirectLineEmulator();
+
+        WebChat.renderWebChat({ directLine, store }, document.getElementById('webchat'));
+
+        await pageConditions.uiConnected();
+
+        await directLine.emulateIncomingActivity({
+          from: {
+            id: 'bot',
+            role: 'bot'
+          },
+          text: 'Hello, World!',
+          type: 'message'
+        });
+
+        await pageConditions.numActivitiesShown(1);
+
+        await host.snapshot('local');
+
+        const metaMap = new Map(
+          Array.from(document.querySelectorAll('meta'))
+            .filter(element => element.name.startsWith('botframework-webchat'))
+            .map(element => [element.name, element.getAttribute('content')])
+        );
+
+        expect(metaMap.has('botframework-webchat:api')).toBe(true);
+        expect(metaMap.get('botframework-webchat:bundle:variant')).toBe('minimal');
+        expect(metaMap.has('botframework-webchat:bundle:version')).toBe(true);
+        expect(metaMap.has('botframework-webchat:bundle')).toBe(true);
+        expect(metaMap.has('botframework-webchat:component')).toBe(true);
+        expect(metaMap.has('botframework-webchat:core:version')).toBe(true);
+        expect(metaMap.has('botframework-webchat:core')).toBe(true);
+        expect(metaMap.has('botframework-webchat:ui:version')).toBe(true);
+      });
+    </script>
+  </body>
+</html>
diff --git a/__tests__/html2/basic/bundle/minimal.html.snap-1.png b/__tests__/html2/basic/bundle/minimal.html.snap-1.png
new file mode 100644
index 0000000000..49d0068b80
Binary files /dev/null and b/__tests__/html2/basic/bundle/minimal.html.snap-1.png differ
diff --git a/packages/component/src/providers/HTMLContentTransformCOR/HTMLContentTransformComposer.tsx b/packages/component/src/providers/HTMLContentTransformCOR/HTMLContentTransformComposer.tsx
index 98324b4093..f9a4d1c708 100644
--- a/packages/component/src/providers/HTMLContentTransformCOR/HTMLContentTransformComposer.tsx
+++ b/packages/component/src/providers/HTMLContentTransformCOR/HTMLContentTransformComposer.tsx
@@ -13,7 +13,7 @@ type HTMLContentTransformComposerProps = Readonly<{
 
 const HTMLContentTransformComposer = memo(({ children, middleware }: HTMLContentTransformComposerProps) => {
   const transform = useMemo<HTMLContentTransformFunction>(() => {
-    const enhancers = middleware.map(enhancer => enhancer()).reverse();
+    const enhancers = (middleware || []).map(enhancer => enhancer()).reverse();
 
     return enhancers.reduce(
       (chain: HTMLContentTransformFunction, fn) => fn(chain),
