Incorrect marks when pasting HTML with nested list

We've encountered an issue when pasting in nested lists from Google Docs where nested list items have styles that conflict with parent items. For a minimal repro, consider this HTML:

<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
  </head>
  <body>
    <meta charset="utf-8" />
    <ul>
      <li style="font-style: italic">
        Italics
        <ul>
          <li style="font-style: normal; font-weight: 400">Normal</li>
          <li style="font-style: normal; font-weight: 700">Bold</li>
          <li style="font-style: italic; font-weight: 400">Italics</li>
        </ul>
      </li>
      <li style="font-weight: 700">
        Bold
        <ul>
          <li style="font-style: normal; font-weight: 400;">Normal</li>
          <li style="font-style: normal; font-weight: 700">Bold</li>
          <li style="font-style: italic; font-weight: 400">Italics</li>
        </ul>
      </li>
    </ul>
  </body>
</html>

When I open this as an HTML file in the browser it looks like this:

When I paste this into prosemirror I get this:

As you can see, the styles from the parent list item are taking precedence over the styles from the children. I would expect the child styles to take precedence, as it does when I view the HTML file in a browser

ProseMirror / prosemirror

Incorrect marks when pasting HTML with nested list #1347