Incorrect parsing nesting

[6562680]

        $dom = Document::loadHtml(''
            . '<ul class="a">'
            /**/ . '<li>a1</li>'
            /**/ . '<li>'
            /****/ . '<ul class="b">'
            /******/ . '<li>b1</li>'
            /******/ . '<li>b2</li>'
            /****/ . '</ul>'
            /**/ . '</li>'
            /**/ . '<li>a2</li>'
            /**/ . '<li>'
            /****/ . '<ul class="b">'
            /******/ . '<li>b3</li>'
            /******/ . '<li>b4</li>'
            /****/ . '</ul>'
            /**/ . '</li>'
            . '</ul>'
        );

        echo count($dom->find('ul li')) . PHP_EOL; // 8, ok
        echo count($dom->find('ul > li')) . PHP_EOL; // 8, ok
        echo count($dom->find('ul.a > li')) . PHP_EOL; // 4, ok
        echo count($dom->find('ul.b > li')) . PHP_EOL; // 4, ok


        $dom = Document::loadHtml(''
            . '<ul class="a">'
            /**/ . '<li>a1</li>'
            /**/ . '<li>'
            /* -- `ul` was removed -- */
            /******/ . '<li>b1</li>'
            /******/ . '<li>b2</li>'
            /* -- `ul` was removed -- */
            /**/ . '</li>'
            /**/ . '<li>a2</li>'
            /**/ . '<li>'
            /* -- `ul` was removed -- */
            /******/ . '<li>b3</li>'
            /******/ . '<li>b4</li>'
            /* -- `ul` was removed -- */
            /**/ . '</li>'
            . '</ul>'
        );

        echo count($dom->find('ul li')) . PHP_EOL; // 8, ok
        echo count($dom->find('ul > li')) . PHP_EOL; // 8, what ?
        echo count($dom->find('ul > li > li')) . PHP_EOL; // 0, what ?

[6562680]

One more example:

$dom = Document::loadHtml(''
    . '<ul class="a">'
    /**/ . '<li>a1</li>'
    /**/ . '<li>'
    /* -- `ul` was removed -- */
    /******/ . '<li>b1</li>'
    /******/ . '<li>b2</li>'
    /* -- `ul` was removed -- */
    /**/ . '</li>'
    /**/ . '<li>a2</li>'
    /**/ . '<li>'
    /* -- `ul` was removed -- */
    /******/ . '<li>b3</li>'
    /******/ . '<li>b4</li>'
    /* -- `ul` was removed -- */
    /**/ . '</li>'
    . '</ul>'
);

$domLi = $dom->find('li', -3);

$this->assertEquals('<li><li>b3</li><li>b4</li></li>', $domLi); // fails :( equals '<li>' without closing tag

[6562680]

One more example. Thats all about the parser. Sorry me.

$document = Document::loadHtml(''
    . '<div>'
    /**/ . '<a href="#">2020 &lt; </a>'
    /**/ . '<a href="#">2020 < </a>'
    . '</div>'
);

$domDiv = $document->find('div', 0);
dd(array_map('strval', $domDiv->children())); // array:2 [ 0 => "2020 &lt;", 1 => "2020" ] // what? where's the outerhtml of each? why only textNodes?