nb-tabset not workign with ng-content

[DLMykolaIvanov]

Issue type

I'm submitting a ... (check one with "x")

• bug report
• feature request

Issue description

Current behavior:
I want an add-on over nb-tabset. I add tabs from the parent component. nb-tabset is empty. How to fix it?

Expected behavior:
nb-tabset working with ng-content.

Steps to reproduce:

1. Create component with nb-tabset -> ng-content
2. Use this component as child component with ng-tab inside.
3. nb-tabset is empty

Related code:

<div>
  <nb-tabset>
    <ng-content></ng-content>
  </nb-tabset>
</div>

<app-tabset>
  <nb-tab [tabId]="id" [tabTitle]="title">
     test content
  </nb-tab>
</app-tabset>

Other information:

npm, node, OS, Browser
node 18.16.0
npm 9.5.1
angular 15.2.9
nebular 11.0.0