Load Stream Level is not working in developent build

Hi,
I’m using the Load Stream Level node in my persistent level blueprint. When I tested it in the VR Preview everything worked fine, but now I made a development build and some levels don’t load.

When I start the game, the first scene (small intro scene, just the title and some planes with the controller mapping) loads correctly. But when the player should enter the first game scene everything is black, the floor is not loaded and the player just falls through nothing.
I tried to load the level with the console command “Open”, but it just stays black, while it works with the intro scene.

For now, I fixed it by placing a cube in the persistent level, beneath the position the player teleports to, so he can’t fall through. The level loads than with the level streaming volume. But that’s not very pretty :confused:

I added a screenshot of my teleport/load level function.

I would be really thankful for some help!

I got this problem before, in my case on Development Build it will package only the current/main level, not the other ones, you may either add manually the levels on project settings or shipping it.

First: Thanks for your answer!
but I don’t think that’s the same issue. I use a persistent level that loads my sublevels. So the intro scene isn’t the current/main level. Level streaming volumes are working, too.
But I will try shipping.