Form only submitting some rows to database - php

Question

I have a form, populated by an uploaded CSV, and upon submit it saves to my database staging/temp table. However, it's only saving the first 4 of 7 rows.
The form:
$file = $_FILES["file"]["tmp_name"];
$handle = fopen($file, "r");
$maxPreviewRows = PHP_INT_MAX; // this will be ~2 billion on 32-bit system, or ~9 quintillion on 64-bit system
$hasHeaderRow = true;
echo "<form method='post' action='/form-submit' >";
echo '<table>';
/*WE WILL NEED TO QA CONDITIONS AND HIGHLIGHT IN RED HERE. ALSO NEED BORDER STYLINGS*/
if ($hasHeaderRow) {
$headerRow = fgetcsv($handle);
echo '<thead><tr>';
foreach($headerRow as $value) {
echo "<th>$value</th>";
}
echo '</tr></thead>';
}
echo '<tbody>';
$rowCount = 0;
while ($row = fgetcsv($handle)) {
$colCount = 0;
echo '<tr>';
foreach($row as $value) {
echo "<td><input name='row[".$rowCount."][".$colCount."]' type='text' value='$value' /></td>";
$colCount++;
}
echo '</tr>';
if (++$rowCount > $maxPreviewRows) {
break;
}
}
echo '</tbody></table>';
echo "<input type='submit' name='confirm' value='confirm'>";
echo '</form>';
}
The submission:
foreach ($_POST['row'] as $rowValue)
{
if( is_array($rowValue) && count($rowValue) > 0 )
{
$sqlFull = "INSERT INTO staging VALUES( DEFAULT, ". substr( str_repeat ( '?, ', count($rowValue) ), 0, -2 ) .")";
if( !$stmt = $connect->prepare($sqlFull) )
{
echo "Prepare failed: (" . $connect->errno . ") " . $connect->error;
}
$stmt->bind_param( str_repeat ( 's', count($rowValue) ), ...$rowValue );
$stmt->execute();
}
}
So it's definitely working but for some reason it's stopping on the fourth row every time. I edit the first field of each row each time and when I check my file dashboard I'll see only the first 4 from each submission.
ANy ideas why this is ending on the 4th row?
UPDATE: