Office Web Word API has different list ids than the resulting ooxml

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When you use the Word Addin API to get list IDs, they can be different from the list IDs in ooxml.

Expected behavior

The IDs should be the same.

Steps to reproduce

1. Open a new Word document in the browser.
2. To make sure you can reproduce the bug, create 4 seperated lists and delete the first two. Make sure they are not linked to each other by inserting an extra paragraph / text between them.
3. Copy the code from below in the script lab and run it
4. In the console you will see word list ids and the xml
5. Copy the xml to your editor go in the /word/document.xml package and check the paragraphs

Script Lab Code

$("#run").on("click", () => tryCatch(run));

async function run() {
  await Word.run(async (context) => {
    const body = context.document.body;

    context.document.body.lists.load("items")
    await context.sync()
    const lists = context.document.body.lists.items
    console.log(
      "lists ids from Word API: ",
      lists.map(list => list.id).sort((a, b) => a - b),
    )

    const docXml = context.document.body.getOoxml()
    await context.sync()
    console.log(`doc ooxml:`, docXml.value)

    await context.sync();
  });
}

// Default helper for invoking an action and handling errors.
async function tryCatch(callback) {
  try {
    await callback();
  } catch (error) {
    // Note: In a production add-in, you'd want to notify the user through your add-in's UI.
    console.error(error);
  }
}

Output:

lists ids from Word API: 
[4, 5]

The respective entries for the paragraphs in the ooxml:

[...]
            <w:pPr>
              <w:pStyle w:val="ListParagraph" />
              <w:numPr>
                <w:ilvl w:val="0" />
                <w:numId w:val="2" />
              </w:numPr>
            </w:pPr>

[...]
            <w:pPr>
              <w:pStyle w:val="ListParagraph" />
              <w:numPr>
                <w:ilvl w:val="0" />
                <w:numId w:val="1" />
              </w:numPr>
            </w:pPr>

Why do I need this?

Right now it's not possible to determine the w:numFmt of list styles through the Word Api. So my workaround was to use the list Id from the API and look up the field in ooxml. But this does not work on the web client.

[microsoft-github-policy-service]

Thank you for letting us know about this issue. We will take a look shortly. Thanks.

[qinliuMSFT]

Thank you for reporting this issue, I can repro it. It has been put on our backlog #9476061 , the team will investigate and we will reply to you as soon as there is any progress. Thank you for your patience.