Selenium and html agility pack drops html - html

Question

I'm using the HTML Agility Pack and Selenium to crawl a site, find particular tables, and then parse those tables. Everything works fine individually, but when I run the app, it sometimes drops huge chunks of HTML from within the table. When I track down the page on the site with the data, the HTML is there. For whatever reason, it isn't there when the crawler is running.
Here's the code. The rows[r].InnerHtml is NOT the HTML from page. Anyone have any thoughts on what might be happening here?
public IMyInterface CreateObjectFromHtmlRow(HtmlNode rowNode)
{
try
{
var columns = rowNode.SelectNodes("td");
MyClass obj = new MyClass()
{
OnlineId = columns[0].InnerText.Trim(),
FirstName = columns[1].InnerText.Trim(),
MiddleInitial = columns[2].InnerText.Trim(),
LastName = columns[3].InnerText.Trim(),
Residence = columns[4].InnerText.Trim(),
};
return obj;
}
catch (Exception exc)
{
_logger.LogFormat("Error trying to parse row: {0}", exc.Message);
return null;
}
}
IMyInterface obj = null;
obj = _repository.CreateObjectFromHtmlRow(rows[r]);
if (obj == null)
{
_logger.LogFormat("Unable to create object from this data: {0}", rows[r].InnerHtml);
}
else
{
// Do something useful
}
Thanks for your help.
WW