exporting html with complex table doesnt work as expected

[ctf0]

This is:

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

What is the expected behavior?

What is the current behavior?

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:

this issue is based on Maatwebsite/Laravel-Excel which internally use PhpSpreadsheet SpartnerNL/Laravel-Excel#2784

<table style="width:100%" border="1">
    <thead>
        <tr>
            // ...
            <th style="text-align: center;" colspan="4">{{ __('Items') }}</th>
            // ...
        </tr>
        <tr>
             // ...
        </tr>
    </thead>

    @foreach ($models->cursor() as $model)
        <tbody>
            <tr>
                // ...

                <td colspan="4">
                    <table style="width:100%">
                        @foreach ($model->relation as $item)
                            <tr>
                                // ...
                            </tr>
                        @endforeach
                    </table>
                </td>

                // ...
            </tr>
        </tbody>
    @endforeach
</table>

public function registerEvents(): array
    {
        return [
            AfterSheet::class => function (AfterSheet $event) {
                $sheet = $event->sheet->getDelegate();
                $sheet->getRowDimension(1)->setRowHeight(30);

                $header = $sheet->getStyle('A1:' . $sheet->getHighestDataColumn() . '1');
                $header->getAlignment()->setVertical(\PhpOffice\PhpSpreadsheet\Style\Alignment::VERTICAL_CENTER);
                $header->getFont()->setBold(true);
                $header->getFill()->setFillType(\PhpOffice\PhpSpreadsheet\Style\Fill::FILL_SOLID)->getStartColor()->setARGB('00000000');
                $header->getFont()->getColor()->setARGB(\PhpOffice\PhpSpreadsheet\Style\Color::COLOR_WHITE);

                $other = $sheet->getStyle('A2:' . $sheet->getHighestDataColumn() . $sheet->getHighestRow());
                $other->getAlignment()->setVertical(\PhpOffice\PhpSpreadsheet\Style\Alignment::VERTICAL_TOP);

                foreach ([$header, $other] as $item) {
                    $item->getAlignment()->setHorizontal(\PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_LEFT);
                    $item->getAlignment()->setWrapText(true);
                }
            },
        ];
    }

Which versions of PhpSpreadsheet and PHP are affected?

PHPSpreadsheet ^1.14
Php ^7.0

if you need any more info, plz ask.

[ctf0]

https://stackoverflow.com/questions/63356980/phpspreadsheet-how-to-export-html-with-sub-headers