diff --git a/packages/nextjs/src/config/manifest/createRouteManifest.ts b/packages/nextjs/src/config/manifest/createRouteManifest.ts
index d37285983d31..487ab05c55d8 100644
--- a/packages/nextjs/src/config/manifest/createRouteManifest.ts
+++ b/packages/nextjs/src/config/manifest/createRouteManifest.ts
@@ -28,9 +28,10 @@ function isRouteGroup(name: string): boolean {
   return name.startsWith('(') && name.endsWith(')');
 }
 
-function normalizeRoutePath(routePath: string): string {
+function normalizeRouteGroupPath(routePath: string): string {
   // Remove route group segments from the path
-  return routePath.replace(/\/\([^)]+\)/g, '');
+  // Using positive lookahead with (?=[^)\/]*\)) to avoid polynomial matching
+  return routePath.replace(/\/\((?=[^)/]*\))[^)/]+\)/g, '');
 }
 
 function getDynamicRouteSegment(name: string): string {
@@ -140,7 +141,7 @@ function scanAppDirectory(dir: string, basePath: string = '', includeRouteGroups
 
     if (pageFile) {
       // Conditionally normalize the path based on includeRouteGroups option
-      const routePath = includeRouteGroups ? basePath || '/' : normalizeRoutePath(basePath || '/');
+      const routePath = includeRouteGroups ? basePath || '/' : normalizeRouteGroupPath(basePath || '/');
       const isDynamic = routePath.includes(':');
 
       // Check if this page has generateStaticParams (ISR/SSG indicator)
diff --git a/packages/nextjs/test/config/manifest/suites/route-groups/app/(api_internal)/api/page.tsx b/packages/nextjs/test/config/manifest/suites/route-groups/app/(api_internal)/api/page.tsx
new file mode 100644
index 000000000000..39c826b4bf16
--- /dev/null
+++ b/packages/nextjs/test/config/manifest/suites/route-groups/app/(api_internal)/api/page.tsx
@@ -0,0 +1 @@
+// API Internal Page
diff --git a/packages/nextjs/test/config/manifest/suites/route-groups/app/(auth-v2)/login/page.tsx b/packages/nextjs/test/config/manifest/suites/route-groups/app/(auth-v2)/login/page.tsx
new file mode 100644
index 000000000000..3776b7545439
--- /dev/null
+++ b/packages/nextjs/test/config/manifest/suites/route-groups/app/(auth-v2)/login/page.tsx
@@ -0,0 +1 @@
+// Login V2 Page
diff --git a/packages/nextjs/test/config/manifest/suites/route-groups/app/(v2.0.beta)/features/page.tsx b/packages/nextjs/test/config/manifest/suites/route-groups/app/(v2.0.beta)/features/page.tsx
new file mode 100644
index 000000000000..66c18edfd787
--- /dev/null
+++ b/packages/nextjs/test/config/manifest/suites/route-groups/app/(v2.0.beta)/features/page.tsx
@@ -0,0 +1 @@
+// Features Beta Page
diff --git a/packages/nextjs/test/config/manifest/suites/route-groups/route-groups.test.ts b/packages/nextjs/test/config/manifest/suites/route-groups/route-groups.test.ts
index c2d455361c4c..32ac315b3571 100644
--- a/packages/nextjs/test/config/manifest/suites/route-groups/route-groups.test.ts
+++ b/packages/nextjs/test/config/manifest/suites/route-groups/route-groups.test.ts
@@ -12,11 +12,14 @@ describe('route-groups', () => {
       expect(manifest).toEqual({
         staticRoutes: [
           { path: '/' },
+          { path: '/api' },
           { path: '/login' },
           { path: '/signup' },
+          { path: '/login' }, // from (auth-v2)
           { path: '/dashboard' },
           { path: '/settings/profile' },
           { path: '/public/about' },
+          { path: '/features' },
         ],
         dynamicRoutes: [
           {
@@ -28,6 +31,8 @@ describe('route-groups', () => {
         ],
         isrRoutes: [],
       });
+      // Verify we have 9 static routes total (including duplicates from special chars)
+      expect(manifest.staticRoutes).toHaveLength(9);
     });
 
     test('should handle dynamic routes within route groups', () => {
@@ -37,6 +42,17 @@ describe('route-groups', () => {
       expect(regex.test('/dashboard/abc')).toBe(true);
       expect(regex.test('/dashboard/123/456')).toBe(false);
     });
+
+    test.each([
+      { routeGroup: '(auth-v2)', strippedPath: '/login', description: 'hyphens' },
+      { routeGroup: '(api_internal)', strippedPath: '/api', description: 'underscores' },
+      { routeGroup: '(v2.0.beta)', strippedPath: '/features', description: 'dots' },
+    ])('should strip route groups with $description', ({ routeGroup, strippedPath }) => {
+      // Verify the stripped path exists
+      expect(manifest.staticRoutes.find(route => route.path === strippedPath)).toBeDefined();
+      // Verify the route group was stripped, not included
+      expect(manifest.staticRoutes.find(route => route.path.includes(routeGroup))).toBeUndefined();
+    });
   });
 
   describe('includeRouteGroups: true', () => {
@@ -46,11 +62,14 @@ describe('route-groups', () => {
       expect(manifest).toEqual({
         staticRoutes: [
           { path: '/' },
+          { path: '/(api_internal)/api' },
           { path: '/(auth)/login' },
           { path: '/(auth)/signup' },
+          { path: '/(auth-v2)/login' },
           { path: '/(dashboard)/dashboard' },
           { path: '/(dashboard)/settings/profile' },
           { path: '/(marketing)/public/about' },
+          { path: '/(v2.0.beta)/features' },
         ],
         dynamicRoutes: [
           {
@@ -62,6 +81,7 @@ describe('route-groups', () => {
         ],
         isrRoutes: [],
       });
+      expect(manifest.staticRoutes).toHaveLength(9);
     });
 
     test('should handle dynamic routes within route groups with proper regex escaping', () => {
@@ -92,5 +112,13 @@ describe('route-groups', () => {
       expect(authSignup).toBeDefined();
       expect(marketingPublic).toBeDefined();
     });
+
+    test.each([
+      { fullPath: '/(auth-v2)/login', description: 'hyphens' },
+      { fullPath: '/(api_internal)/api', description: 'underscores' },
+      { fullPath: '/(v2.0.beta)/features', description: 'dots' },
+    ])('should preserve route groups with $description when includeRouteGroups is true', ({ fullPath }) => {
+      expect(manifest.staticRoutes.find(route => route.path === fullPath)).toBeDefined();
+    });
   });
 });