Caption belongs to the second table:
```
% pandoc -f docx -t html command/9358.docx
^D
<p>Lorem gipsum</p>
<table>
<colgroup>
<col style="width: 50%" />
<col style="width: 50%" />
</colgroup>
<thead>
<tr>
<th>A</th>
<th>B</th>
</tr>
</thead>
<tbody>
<tr>
<td>C</td>
<td>D</td>
</tr>
</tbody>
</table>
<p>Lorem ipsum</p>
<table>
<caption><p>Table 1 Numbers from 1 to 4</p></caption>
<colgroup>
<col style="width: 50%" />
<col style="width: 50%" />
</colgroup>
<thead>
<tr>
<th>1</th>
<th>2</th>
</tr>
</thead>
<tbody>
<tr>
<td>3</td>
<td>4</td>
</tr>
</tbody>
</table>
<p>Lorem yipsum</p>
```