Compatibility with gin_login

CAPTCHA is rendering correctly. The issue is form element ordering.

The CAPTCHA module inserts the CAPTCHA before the form actions. After that, `gin_login_form_alter()` changes the login form layout and sets the actions wrapper weight to `98`, which moves the submit button above the CAPTCHA.

In `gin_login.module`:

/**
   * Form_alter()
   */
  function gin_login_form_alter(&$form, $form_state, $form_id) {
    // User form (Login, Register or Forgot password)
    if (strpos($form_id, 'user_login') !== FALSE || strpos($form_id, 'user_register') !== FALSE || in_array($form_id, ['user_pass'])) {
      $form['actions']['submit']['#attributes']['class'][] = 'button--primary';

      // Move actions before new elements.
      $form['actions']['#weight'] = '98';
    }
  }

So this looks like a Gin Login/CAPTCHA integration ordering issue, not a CAPTCHA rendering issue.

A safe project-level fix is to add a small custom form alter hook and explicitly keep CAPTCHA before the submit button:

/**
   * Implements hook_form_FORM_ID_alter() for user_login_form.
   */
  function MYMODULE_form_user_login_form_alter(array &$form, \Drupal\Core\Form\FormStateInterface $form_state): void {
    if (isset($form['captcha'])) {
      $form['captcha']['#weight'] = 97;
    }

    if (isset($form['actions'])) {
      $form['actions']['#weight'] = 98;
    }

    if (isset($form['more-links'])) {
      $form['more-links']['#weight'] = 99;
    }
  }

  /**
   * Implements hook_form_FORM_ID_alter() for user_pass.
   */
  function MYMODULE_form_user_pass_alter(array &$form, \Drupal\Core\Form\FormStateInterface $form_state): void {
    if (isset($form['captcha'])) {
      $form['captcha']['#weight'] = 97;
    }

    if (isset($form['actions'])) {
      $form['actions']['#weight'] = 98;
    }

    if (isset($form['more-links'])) {
      $form['more-links']['#weight'] = 99;
    }
  }

After adding this, clear Drupal cache.