different output on two list

[weyou]

import io, mistletoe
text = """
### A part
1. a1
2. a2
3. a3
4. a4

### B part
1. b1
2. b2
3. b3
4. b4
"""

with io.StringIO(text) as fd:
    html = mistletoe.markdown(fd)
    print(html)

output

<h3>A part</h3>
<ol>
<li>
<p>a1</p>
</li>
<li>
<p>a2</p>
</li>
<li>
<p>a3</p>
</li>
<li>
<p>a4</p>
</li>
</ol>
<h3>B part</h3>
<ol>
<li>b1</li>
<li>b2</li>
<li>b3</li>
<li>b4</li>
</ol>

Note that the list in A part rendered as <li><p>text</p></li>, but B part rendered as <li>text</li>.

What's the difference between part A and part B? I think both of them should be rendered as the same html code.

[weyou]

Duplicate of #65