Can't show hidden object

[Consoler_whole]

Hi.

Strange things here happen. I have a Smoke Builder object on scene. I wish it become visible if switcher blueprint have " exchanged? " variable value is ’ false '. But it not become visible. But if I do it object visible, I can hide it.

Here part of blueprint.

[Consoler_whole]

Ok. I still don’t understand why I can hide, but can’t show actor.

But I found other way.

This is smoke BP from engine starter lib. I did it hidden on scene and after just respawn. Work.

[Consoler_whole]

I discover another strange thing. Those smoke and spark BP work only from Engine starter content. If you duplicate this in any other folder, they will not work. It ultra strange.