why when i try save xlsx file from mobile sites thats return me filename.xlsx.html, but on desktop this work fine
$xlsSave = new Xls($spreadsheet);
header('ContentType:application/vnd.openxmlformatsofficedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment; filename="' . $filename . '.xlsx"');
$xlsSave->save('php://output');