rich documentation markdown conversion fails for some `arguments` sections

[jmbuhr]

When requesting the hover for e.g. the source function, the Arguments section ends up as raw htm instead of (pandoc's or github's) markdown

### Arguments

<table>
<colgroup>
<col style="width: 50%" />
<col style="width: 50%" />
</colgroup>
<tbody>
<tr class="odd">
<td><code>file</code></td>
<td><p>a connection or a character string giving the pathname of the file or URL to read from. The <code>stdin()</code> connection reads from the console when interactive.</p></td>
</tr>
<tr class="even">
....

[jrhadams]

I have the same behavior while using the rlanguageserver within neovim. Has anyone found a solution for this (Asside from r.lsp.rich_documentation = false)?