Actor not shown in Android

I am veeeeery new with UE.
I am making a little game abouts mazes.
I use a maze generator plugin that provide a BP of a maze.
I created a level and drag and drop the BP in it, so the maze actor is created in the level.
I have used the UE tool to create the floor and used the shortcut to place the maze on the floor (same for the start player actor).
In the window compiled exe all is rendered as I expect, but when I compile for android and use the apk file to install the game in my android phone, the maze is not shown as it does not exists.
What can cause this behaviour?

P.S. I tryed to put a cone near the maze actor and the cone is shown correctly. So I think the problem is about the specific maze actor. May be some events or configuration managed by C++ class?