PHPSpreadsheet pie chart with part separated unwantedly

[DabLoan]

This is:

- [x] 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?

When I use the template with pie charts on it the output shall keep them.

What is the current behavior?

The part in the pie charts in the output are separated :
Expected :

Actual output :

What are the steps to reproduce?

I take data from a json file and put result in var to fill the cells.
test-template.xlsx

<?php

require __DIR__ . '/vendor/autoload.php';

use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

// Create new Spreadsheet object
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();

$json = file_get_contents("toexcel.json");

$parsed_json = json_decode($json);
$data1 = $parsed_json->{'donneestaxesex'}->{'chaussea'}[0]->{'invariants'}[0]->{'modeoccupation'}[0]->{'DIF'};
$data2 = $parsed_json->{'donneestaxesex'}->{'chaussea'}[0]->{'invariants'}[0]->{'modeoccupation'}[0]->{'INC'};
$data3 = $parsed_json->{'donneestaxesex'}->{'chaussea'}[0]->{'invariants'}[0]->{'modeoccupation'}[0]->{'LNO'};
$data4 = $parsed_json->{'donneestaxesex'}->{'chaussea'}[0]->{'invariants'}[0]->{'modeoccupation'}[0]->{'LOC'};
$data5 = $parsed_json->{'donneestaxesex'}->{'chaussea'}[0]->{'invariants'}[0]->{'typeoccupation'}[0]->{'partielle'};
$data6 = $parsed_json->{'donneestaxesex'}->{'chaussea'}[0]->{'invariants'}[0]->{'typeoccupation'}[0]->{'totale'};

$reader = IOFactory::createReader('Xlsx');
$reader->setIncludeCharts(true);
$spreadsheet = $reader->load('test-template.xlsx');
$sheet = $spreadsheet->getActiveSheet();
$sheet->setCellValue('J4', $data1);
$sheet->setCellValue('J8', $data2);
$sheet->setCellValue('J9', $data3);
$sheet->setCellValue('J10', $data4);
$sheet->setCellValue('J13', $data5);
$sheet->setCellValue('J14', $data6);


$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
$writer->setIncludeCharts(true);
$writer->save('test-output.xlsx');

Which versions of PhpSpreadsheet and PHP are affected?

PHP 7.4.10.
PHPSpreadsheet using latest version.