Mongoose post hook limbo when saving with await

I’m creating a post hook to create a slug after the a Post has been save. When I try and use Postman the check my result, the process go into limbo (no data was returned).I am using [email protected].

Code for the post hook:

PostsSchema.post("save", async function (doc, next) {
  try {
    doc.postSlug = slugify(doc.postTitle, { lower: true });
    await doc.save();
    return next();
  } catch (err) {
    console.log("inside catch method");
    return next(createError(500, err.message));
  }
});

Code for the route I use:

module.exports.createPost = async (req, res, next) => {
  const { postTitle, postContent, postAuthor } = req.body;
  try {
    // check if author exist
    const authorExist = await AccountsModel.findById(postAuthor);
    if (!authorExist) {
      return next(createError(404, `Author ID: ${postAuthor} Not Found`));
    }
    // create post
    console.log("route 1")
    const postNew = new PostsModel({
      postTitle: postTitle,
      postContent: postContent,
      postAuthor: postAuthor,
    });
    await postNew.save();
    // populate data for return
    let postCreated = await postNew.populate("postAuthor");
    return res.status(200).json({
      code: 1,
      success: true,
      message: "New Post Created",
      data: postCreated,
    });
  } catch (error) {
    return next(createError(500, error.message));
  }
};

I did fix this by removing the await in front of the doc.save():

PostsSchema.post("save", async function (doc, next) {
  try {
    doc.postSlug = slugify(doc.postTitle, { lower: true });
    doc.save();
    return next();
  } catch (err) {
    console.log("inside catch method");
    return next(createError(500, err.message));
  }
});

But found some other post what have await and the answers indicate that it is not the problem:

• How to properly make a Mongoose post hook async
• Mongoose post save hook , update the document
• Async function in mongoose pre save hook not working. pre hook seems to work just fine with the await.
• https://stackoverflow.com/a/76738359/14723731. This one is the same as mine where they don’t use an await method

So, I am wondering is it the await that break the process or something else?