Issue with Import / Export and File Repository API

I created a dashboard in pentaho CDE with some title and description.

Now when I call the api "pentaho/api/repo/files/[Path]/children?showHidden=false&filter=*.wcdf", I am getting file list with properties.

However, if I change the properties like title / description, and save the dashboard those changes are not getting reflected.

Also when I export these files and import into another folder, the description property is not coming in the api call.

What could be the reason and how to solve this?