Describe the bug
Sorry if the title's a mess, but it should be clear with the example markdown and how they look

To Reproduce

Render this on a page:

1. Ordered List 1
    * Unordered List 1
        1. Ordered List 2
            * Unordered List 2
                * Unordered List 3

---

1. Ordered List 1
    1. Ordered List 2 - Item 1
        * Unordered List 1 - Item 1
        * Unordered List 1 - Item 2
    2. Ordered List 2 - Item 2

and see:

Note that the HTML is reasonable - it does emit <ol> and <ul> as expected, and the browser-default markers are correct for these lists if you tweak the CSS to not have list-style: none.

Expected behavior

Just like Unordered List 1 in the first snippet I expect any unordered list to get bullets, and definitely not to affect the ordering of the parent ordered list.

Reproducible in both Chrome and Firefox