ADDITIONAL SYSTEM INFORMATION :
PC / Windows 10 / Java 18 / JavaFX 18.0.2

A DESCRIPTION OF THE PROBLEM :
Using a WebView to connect to my company employees webpage, the login process is handled properly (it's an SSO login page) BUT when I try to retrieve the input fields (in a documentProperty Listerner) via webView.getEngine().getElementsByTagName("input"), only two hidden fields are return and not the active login and password ones. As a matter of a fact, it's a whole bunch of elements that are not present in the engine's DOM despite they are properly rendered and usable.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- open a webview and load the following url : <link>
- in a document property listener, get the newDoc call getElementsByTagName("input") and return the result in a NodeList
- display the attributes of all returned nodes

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
One should have 16 input elements returned, as when you do the call in firefox console : console.log(document.getElementsByTagName('input'));
ACTUAL -
Only 2 input elements are returned : the ones named _xsrfToken and fromURI

---------- BEGIN SOURCE ----------
/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/javafx/FXMLController.java to edit this template
 */


import java.net.CookieHandler;
import java.net.CookieManager;
import java.net.CookiePolicy;
import java.net.HttpCookie;
import javafx.fxml.FXML;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebErrorEvent;
import javafx.scene.web.WebEvent;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;


public class LoginViewController {

    @FXML
    private WebView webView;
    
    private WebEngine we;
    CookieManager cookieManager;
    Stage loginStage;
    MainViewController mainViewController;

    @FXML
    public void initialize() {
        we = webView.getEngine();
        cookieManager = new CookieManager();
        cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
        CookieHandler.setDefault(cookieManager);
        connect();
    }

    /**
     * Sets the stage of this dialog.
     *
     * @param dialogStage
     */
    public void setStage(Stage loginStage) {
        this.loginStage = loginStage;
    }

    public void setMainViewController(MainViewController mainViewController) {
        this.mainViewController = mainViewController;
    }

    public void connect() {
        we.documentProperty().addListener((obs, oldDoc, newDoc) -> {
            if (newDoc != null) {
                listNodesByName(newDoc, "input");
            }
        });

        we.locationProperty().addListener((obs, oldLocation, newLocation) -> {
            if (newLocation.equals("<link>")) {
                for (HttpCookie cookie : cookieManager.getCookieStore().getCookies()) {
                    if (cookie.getName().contains("SessionId")) {
                        mainViewController.setSessionId(
                                cookie.getName() + "=" + cookie.getValue());
                    }
                }
                mainViewController.launchConnectionWithToken();
                loginStage.close();
            }
        }
        );

        we.setJavaScriptEnabled(true);
        we.setOnAlert(
                (WebEvent<String> event) -> {
                    System.out.println(event.toString());
                }
        );
        we.setOnError(
                (WebErrorEvent event) -> {
                    System.out.println(event.toString());
                }
        );
        we.setUserAgent("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0");
        we.load("<link>");
    }

    private void listNodesByName(Document doc, String name) {
        NodeList nl = doc.getElementsByTagName(name);
        if (nl != null) {
            System.out.println(nl.toString());
            for (int i = 0; i < nl.getLength(); i++) {
                if (nl.item(i).getNodeType() == Node.ELEMENT_NODE) {
                    Element el = (Element) nl.item(i);
                    listAllAttributes(el);
                }
            }
        }
    }

    private void listAllAttributes(Element element) {

        System.out.println("List attributes for node: " + element.getNodeName());

        // get a map containing the attributes of this node
        NamedNodeMap attributes = element.getAttributes();

        // get the number of nodes in this map
        int numAttrs = attributes.getLength();

        for (int i = 0; i < numAttrs; i++) {
            Attr attr = (Attr) attributes.item(i);

            String attrName = attr.getNodeName();
            String attrValue = attr.getNodeValue();

            System.out.println("Found attribute: " + attrName + " with value: " + attrValue);
        }
    }
}
---------- END SOURCE ----------

FREQUENCY : always