diff --git a/packages/next/src/build/webpack/plugins/flight-manifest-plugin.ts b/packages/next/src/build/webpack/plugins/flight-manifest-plugin.ts
index 12e9a4d386f9a..b4423c3b21e64 100644
--- a/packages/next/src/build/webpack/plugins/flight-manifest-plugin.ts
+++ b/packages/next/src/build/webpack/plugins/flight-manifest-plugin.ts
@@ -351,10 +351,16 @@ export class ClientReferenceManifestPlugin {
       // - app/foo/page -> app/foo
       // - app/(group)/@named/foo/page -> app/foo
       // - app/(group)/@named/(.)foo/page -> app/(.)foo
-      const groupName = normalizeAppPath(entryName).replace(
-        /\/(page|loading|layout|route|default|error|not-found)(\.tsx?|\.jsx?)?/g,
-        ''
-      )
+      const preGroupName = entryName
+        .slice(0, entryName.lastIndexOf('/'))
+        .replace(/\/@[^/]+/g, '')
+        .replace(/\/\([^/]+\)/g, '')
+
+      const groupName = normalizeAppPath(entryName, [
+        'loading',
+        'layout',
+      ]).slice(1)
+      console.log({ preGroupName, groupName })
 
       if (!manifestsPerGroup.has(groupName)) {
         manifestsPerGroup.set(groupName, [])
diff --git a/packages/next/src/shared/lib/router/utils/app-paths.ts b/packages/next/src/shared/lib/router/utils/app-paths.ts
index 59273bdce4ac4..667817259adf8 100644
--- a/packages/next/src/shared/lib/router/utils/app-paths.ts
+++ b/packages/next/src/shared/lib/router/utils/app-paths.ts
@@ -19,7 +19,10 @@ import { ensureLeadingSlash } from '../../page-path/ensure-leading-slash'
  * @param route the app route to normalize
  * @returns the normalized pathname
  */
-export function normalizeAppPath(route: string) {
+export function normalizeAppPath(route: string, extraLeafs?: string[]) {
+  const DEFAULT_LEAFS = ['page', 'route']
+  const mergedLeafs = [...(extraLeafs ?? []), ...DEFAULT_LEAFS]
+
   return ensureLeadingSlash(
     route.split('/').reduce((pathname, segment, index, segments) => {
       // Empty segments are ignored.
@@ -38,10 +41,7 @@ export function normalizeAppPath(route: string) {
       }
 
       // The last segment (if it's a leaf) should be ignored.
-      if (
-        (segment === 'page' || segment === 'route') &&
-        index === segments.length - 1
-      ) {
+      if (mergedLeafs.includes(segment) && index === segments.length - 1) {
         return pathname
       }