Automatic scroll bar

When sending a comment, the scroll bar automatically drops, if you click the add comments button, the scroll bar does not work as before.

https://snippet.webix.com/249o6r32

I found the solution using the command:

var x = $$(“comments”).add({text:“New Message”, user_id:2, date:new Date()});
$$(“comments”).$exportView().showItem(x);

Example: Code Snippet