`cloneNode()` produces `null` body on HTMLDocument

[tai2]

import { DOMParser, Element, HTMLDocument, Node } from "../../deno-dom-wasm.ts";
import {
  assert,
  assertEquals,
} from "https://deno.land/std@0.85.0/testing/asserts.ts";

Deno.test("cloneNode", () => {
  const doc = new DOMParser().parseFromString(
    `
    a
    <p>b</p>
    <ul><li>c</li></ul>
    <!-- d -->
    <a id="e">e</a>
  `,
    "text/html"
  )!;

  const doc2 = doc.cloneNode(true) as HTMLDocument;
  assert(doc2.body !== null); // This is supposed to be true but gets false really
});

[b-fuze]

Thanks