为什么find()方法不显示Express.Js中mongoDb数据库的最新数据

When the app.post('/form-submit', funtion(req, res)) method is called then i am expecting it to first save the data using save(), which it did fine but then i call find() method which shows all the data from mongoDB database except the current data that is recently added by save() method.

I want that find() method show the current data as well. But show() method only shows previous data not recent one. And i thing maybe it is Asynchronous problem

//For Put request in index.js
app.post('/form-submit', function(req, res) {

    //To add the current data into database

    connect.then((db) => {
        var newTask = taskSchema({
            Task: req.body.Task
        });
        newTask.save();

    });


    //To show the data into page 'showTask.ejs
    taskSchema.find({}, function(err, val) {
        console.log(res.length);
        res.render('showTask.ejs', { todoTask: val });
    });

});