Join session not loading persistent level for client

Hi all!)

Faced a problem with multiplayer.
I did create a level with a menu for creating a session and to join a session.

The session opens level which contains persistent levels. But when the client joined, is not loading persistent level.
On the right on the image, the host has a blue plane, on the left client without this plane

Maybe someone knows why this happening?

The problem is caused by world composition. And when to exclude it there is no such problem. Why the world composition does not generate a landscape when using the dedicated server I did not figure out yet.