laravel-dompdf queued job

I have an issue with dompdf and queued jobs. Any help on this topic is very welcome :)

When exporting a resource to pdf synchronously everything works as expected. As soon as I queue the job the following code doesn't work anymore and breaks the layout of my pdf:

<script type="text/php"> $GLOBALS['entity_page'][] =  $pdf->get_page_number()-2; </script>

<script type="text/php">
$pdf->page_script('
        if ($PAGE_NUM > 2) {
            $font = $fontMetrics->getFont("Open Sans");
            $current_page = $PAGE_NUM-2;
            $total_pages = $PAGE_COUNT-2;
            $text = "Seite $current_page von $total_pages";
            $width = $fontMetrics->get_text_width($text, $font, 8) / 2;
            $x = ($pdf->get_width() - $width) / 2;
            $y = $pdf->get_height() - 35;
            $pdf->text($x, $y, $text, $font, 8, array(0,0,0));
        }
    ');

    $GLOBALS["entity_val"] = 0;
    $GLOBALS["entity_y"] = 120;
    foreach ($GLOBALS['entity_page'] as $key => $val) {
        $pdf->page_script('if($PAGE_NUM == 2){
                 $font = $fontMetrics->getFont("Open Sans");
                 $x = 550;
                 $y = $GLOBALS["entity_y"];
                 $pdf->text($x, $y, " Seite ".$GLOBALS["entity_page"][$GLOBALS["entity_val"]]."" , $font, 7, array(0, 0, 0, 1));
                $GLOBALS["entity_y"] = $GLOBALS["entity_y"] +14.3;
                 $GLOBALS["entity_val"] = $GLOBALS["entity_val"] + 1;
                }');
    }
</script>

This code is supposed to build a table of contents. As I said everything works flawlessly when exporting synchronously. Does anybody have input on this?