Empty field stop ListQuery and first field is never printed

[dbollaer]

I want to download an entire spreadsheet.
To compare locally.

        $query = new ZendGData\Spreadsheets\ListQuery();
        $query->setSpreadsheetKey($this->getKey());
        $query->setWorksheetId($id);
        $query->setMaxResults(NULL);
        $listFeed = $this->getSpreadsheetService()->getListFeed($query);



        foreach ($listFeed as $row) {
            $rowData = $row->getCustom();

            foreach($rowData as $customEntry) {
                echo($customEntry->getText());
            }
        }

|first row|
|table|
'emtpy row'
|result|

prints table

expected first row, table, result

Am I using your api wrongly?