{|
| <div>foobar</div> <span style="display:none" class="sortkey">5000000000000000000</span>0 style="background: #ececec; color: grey; vertical-align: middle; text-align: center;" class="table-na" | <small>N/A</small>
|}

All content between the "|" and "|" are <td> attributes and the sanitizer drops everything that is not a valid attribute. Not sure how important this is, but if a simple tweak will fix this, we can consider this. But, probably not worth a lot of effort unless this is encountered not so infrequently in wikis.