Too many redirects error, user considered as anonymous

Configured Simplesaml authentication module on Drupal 9 environment. We are force redirecting the user to SAML login page (saml_login) when a user tries to access any page of the website. This is written in a custom module (.module) file. That means only logged in / authenticated users can see the website.

Some times / in few cases, we are seeing "The page isn't working, website redirected you too many times" issue after login into SAML. Probably login was successful with IDP but Drupal not able to fetch User ID quickly. If we refresh the page then User ID fetching up properly. Some times login page is redirecting user properly to home page with successful authentication.

There is no quick sync between SAML login and Drupal user data. We have tried with below codes.

$userID = \Drupal::currentUser()->id();
$is_anonymous = \Drupal::currentUser()->isAnonymous();
if ($userID == 0 && $is_anonymous == 1) {
if (!in_array($route_name,['user.login', 'user.logout', 'saml_login'])) {
$response = new RedirectResponse($base_url . '/saml_login');
$response->send();
}
}
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$simplesaml = \Drupal::service('simplesamlphp_auth.manager');
if ($simplesaml->isActivated() && $simplesaml->isAuthenticated()) {
}else{
if (!in_array($route_name,['user.login', 'user.logout', 'saml_login']) && $userID != 1) {
$response = new RedirectResponse($base_url . '/saml_login');
$response->send();
}
}