Multiline Additional Fields for Assets not showing correctly.

When I add Multiline Additional Fields to Assets they don't show up as multi line in the create/edit asset page.

This is my additional field:

It contains 4 lines in total:
Fahrzeug Nr.:
Fahrer Nr.:
Cadis User:
Barcodes:

This is data I only need for our scanners - so I don't want to waste Additional Fields and make each one it's own field.

This is how it looks in add/edit asset page:

Scrolling doesn't work either.

The problem is the way SD+ renders these fields:

<td height="20" align="left" valign="top" nowrap class="fontBlack"><span class="fontBlack">

                    <textarea name="udfName14" class="workstationforminput" title="Für Scanner">Fahrzeug Nr.:
Fahrer Nr.:
Cadis User:
Barcodes:</textarea>
                    </td>

The <td height="20"> causes the problem in my opinion. Could I request the height restriction to either be removed or adapted to make the multiline fields show up properly?

Thanks
Andy