Apache + Chrome + PHP => Infinite Loading - php

Question

I'm running on a custom local domain a login form. I have a simple router which redirects to the Controller, and the login method of the controller is the following:
public static function login()
{
if ($_SERVER['REQUEST_METHOD'] == "POST") {
echo "What the f***!";
} else {
self::renderLoginForm();
}
}
Here is the code of the router:
$requested_path = explode('?', $_SERVER['REQUEST_URI'], 2)[0];
try {
if (preg_match('/[^.]+.css/', $requested_path)) {
$file_path = __DIR__ . "/Public" . $requested_path;
if (file_exists($file_path)) {
header('Content-Type: text/css');
echo file_get_contents($file_path);
}
} elseif (preg_match('/[^.]+.js/', $requested_path)) {
$file_path = __DIR__ . "/Public" . $requested_path;
if (file_exists($file_path)) {
header('Content-Type: text/js');
echo file_get_contents($file_path);
}
} elseif ($requested_path === "/") {
PageController::homeAction();
} elseif ($requested_path == "/api/recognize") {
SoundController::recognizeAction();
} elseif ($requested_path == "/login") {
UserController::login();
} else {
PageController::notFoundAction();
}
} catch (Throwable $throwable) {
if (ISDEV) {
echo $throwable->getMessage();
echo $throwable->getTraceAsString();
} else {
echo "Erreur 500";
}
}
Using GET method, the form is well rendered, I can refresh, do anything, everything works. But when I'm validating my form, Chrome starts in an infinite loading (Not displaying my echo).
I tried the following:
Safari or Postman => POST works like a charm
Chrome + XDebug => POST works like a charm
Clear all data, then Chrome => POST does not work
Private Navigation Window => POST does not work
Restart server then Chrome => POST does not work
Restart MBPro then Chrome => POST does not work
I double checked that it's same URL, and same ports everytime.
I had this problem prior to XDebug installation. Actually this problem is the reason why I installed XDebug
If you have any idea where it could come from, that would be very very helpful, because I'm running out of things to try.
EDIT with CAUSE
I finally found why, even if I don't know how to solve it. When I don't set any password, the POST is sent well, without any problem, the problem occurs only when I set a password.
After uninstalling and installing Chrome, it finally worked with password set, but taking a lot of time loading, before showing me the Save password popup.
After finding this cause, I switch off my internet connection, and then it worked like a charm.
Then question
Does anyone know how to disable the automatic save password popup for some domains only?