Cannot generate word file in render process for one Electron app

[ecool2011]

Environment

1. node -v: 13.14.0
2. npm -v: 6.14.4
3. npm ls officegen: 0.6.5
4. Operating system: Win7
5. Microsoft Office version: Office 2012
6. Problem with Powerpoint, Excel or Word document: Word

Steps to Reproduce

I used following codes to generate a test word in render process, e.g: render.js
const officegen = require('officegen');
var docx = officegen('docx');
var out = fs.createWriteStream(“c:\\temp\\test.docx”);
out.on('close', function() {
console.log(' stream closed');
})
var p = docx.createP({ align: 'left' });
p.addText('Title：', { font_size: 15 });
docx.generate(out);

Expected Behavior

A test.docx will be generated under c:\temp folder

Actual Behavior

File is genereated, no error occurppted and file size is zero, or if the file size is not zero, but cannot open it in Office Word.
I debugged my codes, seems the stream out event always cannot be rasied.

I also test same codes in main processs, e.g: main.js, it works well.. >_<