Tabel materialize berantakan

saya awalnya tes bikin tabel tanpa konek database dan lancar.tetapi pas konek ke database malah baris ke 2nya nyatu semua jadi acak2an tampilannya cara benerinnya gimna ya gan?

<table>
        <thead>
          <tr>
              <th>Name</th>
              <th>Item Name</th>
              <th>Item Price</th>
          </tr>
        </thead>

        <tbody>
          <tr>
            <td>Alvin</td>
            <td>Eclair</td>
            <td>$0.87</td>
          </tr>
          <tr>
            <td>Alan</td>
            <td>Jellybean</td>
            <td>$3.76</td>
          </tr>
          <tr>
            <td>Jonathan</td>
            <td>Lollipop</td>
            <td>$7.00</td>
          </tr>
        </tbody>
      </table>

<table class="responsive-table">
        <thead>
          <tr>
              <th>Kode Jenis Barang</th>
              <th>Nama Jenis Barang</th>
              <th>Brand</th>
              <th>Keterangan</th>
          </tr>
        </thead>
<?php
  include 'config/koneksi.php';
  $data = mysqli_query($conn,"select * from jenis_barang");
  while($d = mysqli_fetch_array($data)){
?>
        <tbody>
          <tr>
            <td><?php echo $d['kd_jenis'];?></td>
            <td><?php echo $d['nm_jenis'];?></td>
            <td><?php echo $d['brand'];?></td>
            <td><?php echo $d['ket'];?></td>
          </tr>

        </tbody>
</table>
<?php
};
?>