[BUG] sheet.addImage() does not working on loaded workbook

[seokhyunyoon]

🐛 Bug Report

sheet.addImage() method does not working on workbook from workbook.xlsx.load()

Lib version: 4.4.0

Steps To Reproduce

Here's my case

const wb = new ExcelJS.Workbook();

//buffer from file
//that file has one sheet named 'Sheet1'
await wb.xlsx.load(buffer);

//imageBuffer is ArrayBuffer from axios
const imageId = wb.addImage({
  buffer: imageBuffer,
  extension: 'png',
});

//and also wb.getImage(imageId) is working fine
/*
 {
  buffer: <Buffer ...>,
  extension:'png',
  type:'image'
 }
*/
wb.worksheets[0].addImage(imageId,'A1:B2')

The expected behaviour:

When I created the workbook and workSheet directly there's no problem.
but it's not working on loaded file.