Click not triggering all events #403

class HtmlUnitClickTest {

    private WebDriver ffDriver;
    private WebDriver huDriver;
    private final static String buttonPage = "<button id=\"testButton\">Click me</button>\n" +
            "<div id=\"logArea\"></div>\n" +
            "<script>\n" +
            "    const button = document.getElementById('testButton');\n" +
            "    const div = document.getElementById('logArea');\n" +
            "\n" +
            "    button.addEventListener('mousedown', e => {\n" +
            "        console.log('up');\n" +
            "        div.innerHTML += \"up \";\n" +
            "    });\n" +
            "    button.addEventListener('mouseup', e => {\n" +
            "        console.log('down');\n" +
            "        div.innerHTML += \"down \";\n" +
            "    });\n" +
            "    button.addEventListener('click', e => {\n" +
            "        console.log('click');\n" +
            "        div.innerHTML += \"click \";\n" +
            "    });\n" +
            "\n" +
            "\n" +
            "</script>";


    @BeforeEach
    void initDrivers() {
        System.setProperty("webdriver.gecko.driver", "c:\\path\\geckodriver.exe");
        FirefoxOptions options = new FirefoxOptions();
        options.setLogLevel(FirefoxDriverLogLevel.FATAL);
        ffDriver = new FirefoxDriver(options);
        huDriver = new HtmlUnitDriver(BrowserVersion.FIREFOX, true) {
            @Override
            protected WebClient modifyWebClient(WebClient client) {
                final WebClient webClient = super.modifyWebClient(client);
                WebClientOptions options = webClient.getOptions();
                options.setCssEnabled(true);
                options.setThrowExceptionOnScriptError(false);
                webClient.setJavaScriptErrorListener(new SilentJavaScriptErrorListener());

                return webClient;
            }
        };
    }

    @AfterEach
    void closeDrivers(){
        ffDriver.close();
        huDriver.close();
    }

    @Test
    void givenFFandHtmlUnit_whenClicking_registerThreeEvents() {
        Assertions.assertEquals(testClicks(ffDriver), testClicks(huDriver));
    }

    private String testClicks(WebDriver driver) {
        driver.get("data:text/html;charset=utf-8," + buttonPage);
        driver.findElement(By.id("testButton")).click();
        return driver.findElement(By.id("logArea")).getText();
    }

}