Image in FirstHeader gets lost during writing

[ljcag]

This is:

- [X] a bug report
- [ ] a feature request
- [X] **not** a usage question (ask them on https://stackoverflow.com/questions/tagged/phpspreadsheet or https://gitter.im/PHPOffice/PhpSpreadsheet)

What is the expected behavior?

I expect that after writing a template with an image in the first header, said image is still visible after saving the template.

What is the current behavior?

When loading a template with an image in the first Header the image is not visible after writing the template.
I do not edit the headers in any way, also the image is still available during editing, which I checked with:
$sheet->getHeaderFooter()
Which generates output like:
...'headerFooterImages' => array ( 'RFFIRST' => PhpOffice\PhpSpreadsheet\Worksheet\HeaderFooterDrawing::__set_state(array( 'path' => 'zip:///tmp/xlsxjQgpOD#xl/media/image1.jpeg', 'imageIndex' => 1,...

What are the steps to reproduce?

Please provide a Minimal, Complete, and Verifiable example of code that exhibits the issue without relying on an external Excel file or a web server:

I know my example does not fully comply with these guidelines, but a template can easily be created by creating an Excelfile and add a JPG-Image to the first Header.

<?php

require __DIR__ . '/vendor/autoload.php';
use PhpOffice\PhpSpreadsheet\IOFactory;

$spreadsheet = IOFactory::load("Path/To/Template/With/ImageHeader");
//Image should still be visible under 'RFFIRST'
var_dump($spreadsheet->getActiveSheet()->getHeaderFooter()); 

$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
//Image gets lost
$writer->save("SpreadsheetWithNoHeader.xlsx");

Which versions of PhpSpreadsheet and PHP are affected?

PhpSpreadsheet: 1.8.2
PHP: 7.0.33

This issue is related to #484 which was marked as stale and never got solved.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
If this is still an issue for you, please try to help by debugging it further and sharing your results.
Thank you for your contributions.

[oleibman]

Duplicate of #484, which was stale, but is now reopened and will be fixed. Removing stale label.