update form serialize in ckeditor ajax all data is update but texarea value is not update ?

Javascript

<script>
  $(document).ready(function(){
        $(function(){
        $('#editjobspost').submit(function(e){
            e.preventDefault();
            CKEDITOR.instances.bio.getData();
                
                var form = $(this);
                var post_url = form.attr('action');
                var post_data = form.serialize();
                $('#loader3', form).html('<img src="<?php echo base_url() ?>/assets/images/loader.gif" />       Please wait...');
                $.ajax({
                    type: 'POST',
                    url: "<?php echo base_url() ?>company/edit-jobs-information",
                    data: post_data,
                    success: function(msg) {
                        
                       alert("done");
                    }
                });
            });
        });
         });  
    
    
</script>

error only textarea value is not update

<textarea class="new-text-area" name="bio" id="bio" class="form-control" placeholder="Write Here...."><?=$rid[0]['bio'];?></textarea>