Routing Bug with PHP Built in Server

Hi,

In my PHP Phalcon 3 Application I have a custom route:

$router->add("/{chapter}/{name}.{type:[a-z]+}", array(
    "controller" => 'images',
    "action" => 'getFile',
));

I test the application local with PHP Builtin Server, other routes are working regulary. If i test the route above: https://localhost:8000/XYZ/test.jpg I always get a 404. But in regards to the documentation it should work: https://docs.phalcon.io/en/latest/reference/routing.html

Do you have any idea whats wrong?

This is my .htrouter for the php built in server:

 <?php

if (!file_exists(__DIR__ . '/' . $_SERVER['REQUEST_URI'])) {
      $_GET['_url'] = $_SERVER['REQUEST_URI'];
 }
return false;

In production i use Nginx but it would be easier if I could use the built in server for local development