Middleware not executed for dynamic routes inside group (/{id:\d+}) but works for static routes #316

Describe the bug

When defining a dynamic route (/{id:\d+}) inside a route group that uses middleware, the middleware is not executed.

Static routes inside the same middleware group work correctly.

For example:

• /user/profile → middleware executes correctly
• /practices/1/submit (static route) → middleware executes correctly
• /practices/{id:\d+}/submit (dynamic route) → middleware does not execute

The request goes directly to the controller method without passing through the middleware.

To Reproduce

1. Define a middleware (example: auth) that logs or validates authentication.
2. Create a route group with middleware:

$app->group('/', [
  'middleware' => 'auth',
  function () use ($app) {

    $app->get('/user/profile', function () {
        return response()->json(['message' => 'profile']);
    });

    $app->post('/practices/{id:\d+}/submit', function () {
        return response()->json(['message' => 'submitted']);
    });

  }
]);

3. Register middleware:

$app->registerMiddleware('auth', function () {
    error_log("Auth middleware called");
});

4. Send request:

POST /practices/1/submit

5. Observe that middleware is not executed.

6. Replace dynamic route with static:

$app->post('/practices/1/submit', ...);

7. Middleware executes correctly.

Expected behavior

Middleware should execute for dynamic routes inside a group the same way it does for static routes.

The dynamic route /practices/{id:\d+}/submit should trigger the auth middleware before reaching the controller.

Additional context

• Leaf version: "leafs/leaf": "^4.4"
• PHP version: PHP 7.4.30
• Server environment: XAMP

This issue only occurs with dynamic parameters inside grouped routes using middleware. Static routes inside the same group work as expected.