PDF Different with Display

Hi, I have custom my invoice as this, but when generate into pdf, somehow the black header totally missing.

Is it due to something missing in my code?

			<td colspan="99">
						<div><b><h3>{{ recipient.name }}</h3></b> {{ recipient.code }}</div>
						<div>{{ recipient.address | newline_to_br }}</div>
						<div>{{ recipient.identifier }}</div>
					<td style="padding-right: 20px; text-align: right">
						{% for field in fields %}
						<td style="font-weight: bold; margin-bottom: 10px; text-align: left">{{ field.label }} </td>
						<td style="text-align: right">{{ field.text }}</td>
						{% endfor %}