cakephp: Duplicate Named Route for plugin

This is a (multiple allowed):

• bug

• enhancement

• feature-discussion (RFC)

• CakePHP Version: 3.6.4

What you did

load plugin with routes in bootstrap Plugin::load('I18nUrl', ['routes' => true]);

call Plugin::routes() at the end of config/routes.php in base app

create a route in plugin

use Cake\Routing\Router;
use Cake\Routing\RouteBuilder;

Router::plugin('Backend', ['path' => '/gestion'], function (RouteBuilder $routes) {
    $routes->connect('/', ['controller' => 'Dashboard', 'action' => 'index'], ['_name' => 'backend.dashboard']);
});

What happened

Cake\Routing\Exception\DuplicateNamedRouteException Error: A route named "backend.dashboard" has already been connected to "/gestion".

What you expected to happen

no duplicate routes

where to search

It’s look like the RoutingMiddleware now check if $this->app is instance of PluginApplicationInterface

the src/Application extends BaseApplication which implement PluginApplicationInterface SO the standard application build plugin routes twice, first via application and bootstrap, second time via the RoutingMiddleware::prepareRouteCollection()