Not set ID

When I am dynamically adding a view to toolbar pivot, webix change my id to its.
For example:
$$(‘pivot’).$$(“filters”).addView({id: ‘test’, view: ‘template’});
after exequte this code webix added view with view_id = ‘$template8’

It appeared after the upgrade of webs from 3.0 to 5.0

It is normal behaviour.
As a complex widget, Pivot includes the basic Webix components, such as datatable, toolbar, etc.
The main interactions between Pivot views are based on their constant IDs.
In order to make each instance of Pivot unique, these IDs are isolated from the outer UI and you can reach them as $$("pivotId").$$("viewId")
For example, the Pivot’s grid is available $$("pivotId"),$$("data") (is available in each initialized pivot).
Newly added views will be isolated as well: https://webix.com/snippet/e595a11b