In Sendgrid Design template, how to use handlebar iteration for table?

I found a undocumented way to make this works. You will need to comment out the each helper like this:

<table>
<tbody>
<!-- {{#each items}} -->
    <tr>
        <td>Col 1</td>
        <td>Col 2</td>
    </tr>
<!-- {{/each}} -->
</tbody>
</table>

I get the same issue. Definitely a bug in the Design Editor. My work around was to:

1. Style the email with the Design Editor.
2. Export HTML.
3. Go back and create a new version of the transaction email using the 'Code Editor' and not the 'Design Editor'.
4. Paste in the previously exported HTML.
5. Find the table that needs the {{each}} loop and place the functions exactly as you did.