Angular确实可以正确路由，但是子路由不会更改地址栏

Question

使用Angular 6 （1）这是路由数组

const appRoutes: Routes = [
    {
        path: 'dashboard',
        component: DashboardComponent
    },
    {
        path: 'administration',
        children: [
        {
            path: 'users',
            component: UserListComponent,
            resolve: { userList: UserListResolverService }
        },
        {
            path: 'user-groups',
            component: UserGroupListComponent
        },
        {
            path: 'permissions',
            component: PermissionComponent
        },
        {
            path: '',
            component: UserListComponent,
            resolve: { userList: UserListResolverService }
        }
    ]
    },
    {
        path: '',
        redirectTo: 'dashboard',
        pathMatch: 'full'
    },
    {
        path: '**',
        redirectTo: 'PageNotFoundComponent',
        pathMatch: 'full'
    },
];

（2）在“管理”的父菜单下单击任何子菜单，该路由将起作用并显示正确的组件模板。     例如，它通过单击用户组显示用户组列表。但是，无论我单击哪个子链接，URL地址栏都保持为http://localhost:46325/administration。

The route tracing has correct url though
e.g., NavigationStart {id: 16, url: "/administration/user-groups", navigationTrigger: "imperative", restoredState: null}

我不确定这是怎么回事。有人可以指出我正确的方向吗？非常感谢。