Incorrect coordinates in footer

Hello

This is more of a discussion than an issue, but just to check if i'm doing something wrong. I'm generating a PDF using MPDF and trying to get coordinates for text in the footer. For some reason specifically the footer elements return invalid coordinates. For the footer element it's returning a negative value for the coordinates, as if it's outside the page.

I'm wondering if I'm passing insufficient amount of data or something to the main method or if you have any other advice.

Here's the code snippet

        $parser = new \Smalot\PdfParser\Parser();
        $pdf = $parser->parseContent($content);
        $pages = $pdf->getPages();

        foreach ($pages as $pageNumber => $page) {
            foreach ($page->getDataTm() as $item) {
                        # getting a negative value for some of the footer items
                }
        }

Thank you

Start with the provided Parser->parseContent(), getPages(), and page->getDataTm() call chain, then reproduce the reported negative footer coordinates using a representative PDF. The issue provides no PDF, source file, or test; done would require determining whether the coordinates are incorrect and documenting a reproducible correction or expected behavior.