Hugo nested shortcodes struggles (shortcode inside bootstrap table) - hugo

Question

On my Hugo-website I use Bootstrap for the layout and as such wanted to have my tables styled by bootstrap as well.
I found this thread, leading me to this nice solution by zwbetz.
However, if I use another shortcode in one of the table cell's markdown, the rendering goes wrong. The table is rendered correctly up until the nested shortcode, and the remainder of the table (starting at that nested shortcode) is rendered in raw markdown inside a separate <p>-element instead of as part of the html table.
The implementation of the table shortcode (table.html) (I just changed the positional parameter with a named one):
{{ $htmlTable := .Inner | markdownify }}
{{ $class := .Get "class" | default "" }}
{{ $old := "<table>" }}
{{ $new := printf "<table class=\"%s\">" $class }}
{{ $htmlTable := replace $htmlTable $old $new }}
{{ $htmlTable | safeHTML }}
The nested shortcode is one that allows me to access the .Site.Params (param.html):
{{ $list := .Site.Params }}
{{ range $index, $element := .Params }}
{{ $list = index $list . }}
{{ end }}
{{ $list }}
The combination of both shortcodes appears in my cookie-policy page (cookies.md excerpt):
...
{{< table class="table" >}}
| Name | Duration | Contents | Purpose |
|---|---|---|---|
| Orejime | {{< param "plugins" "orejime" "cookieExpiresAfterDays" >}} days| | Used for letting the website know which cookies you want to allow/decline. |
{{< /table >}}
...
The rendered html looks like this (I manually added some indentation for clarity):
<table class="table">
<thead>
<tr>
<th>Name</th>
<th>Duration</th>
<th>Contents</th>
<th>Purpose</th>
</tr>
</thead>
<tbody>
<tr>
<td>Orejime</td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>365 days | | Used for letting the website know which cookies you want to allow/decline. |
</p>
While the expected output is:
<table class="table">
<thead>
<tr>
<th>Name</th>
<th>Duration</th>
<th>Contents</th>
<th>Purpose</th>
</tr>
</thead>
<tbody>
<tr>
<td>Orejime</td>
<td>365 dagen</td>
<td></td>
<td>Used for letting the website know which cookies you want to allow/decline.</td>
</tr>
</tbody>
</table>
If I expose .Inner of the table-shortcode, I do get the correct markdown with the param-shortcode substituted. But applying markdownify, Hugo decides to do some funny stuff.
I tried all combinations of {{< ... >}}-style and {{% ... %}}-style shortcodes, but nothing yields me the expected output.