Failed to open word file(.docx) when Text box on header or footer

[sjhank]

When I try to read the word(.docx) template file which has text box on header (or footer) and output the document file. Word will pop up windows about "Word found unreadable content in xxx.xlsx" when I open the output file.

Here is program:

var templatePath = @".\Template.docx";
var outputPath = @".\Output.docx";

using var templateFileStream = new FileStream(templatePath, FileMode.Open, FileAccess.Read);
var doc = new XWPFDocument(templateFileStream);

using (var outputFileStream = new FileStream(outputPath, FileMode.Create))
{
    doc.Write(outputFileStream);
}

Here is template file:
Template.docx

[tonyqus]

I can reproduce the issue

[tonyqus]

header1.xml is lack of a few w16 prefix xml namespace and this Word file is using Microsoft Office 16.0 features.