tv.rambler.ru - element hiding rules `##`, `#$#` do not apply to the site

[zloyden]

The problem is element hiding rules ##, #$# like the example below are not applied to the site.

tv.rambler.ru##body

To reproduce it:

1. turn all filters off
2. add the rule above to the user rules
3. open the site tv.rambler.ru in any browser. You will see that the page is not hidden.

Screenshot:

Expected behaviour - element hiding rules must be applied.

[AdamWr]

Regarding tv.rambler.ru, as far as I understand, the problem is that whole content is removed and then re-added (currently there is b.removeChild(b.documentElement) in https://tv.rambler.ru/static/js/desktop.vendors.9ea7661d.js) and it causes that style tag added by AdGuard is removed.

---

Another example.
The same problem occurs if website remove and then re-add head tag.
Steps to reproduce:

1. Add this rule:

example.org##body

2. Go to - https://example.org/
3. Open browser console and run:

(() => {
  const head = document.head;
  const cloneHead = head.cloneNode(true);
  cloneHead.querySelectorAll('style[nonce][type="text/css"]').forEach(e => e.remove());
  document.documentElement.insertAdjacentElement('afterbegin', cloneHead);
  setTimeout(() => {
    head.remove();
  }, 500);
})();

Expected behavior
Content is hidden by example.org##body

Actual behavior
Style tag added by AdGuard is removed.