I do not know. Have you tried implementing a delay to give the application time to register that it has been generated?
I do find Unreal can, at times, have trouble validating the existence of actors. I actually have a few actors in my scene that are ALWAYS loaded because Unreal will declare that they are invalid (I’d create a validation script that prints to screen), and I’ll literally be looking at them in the game while it’s playing.
Worst case scenario, you can hide these objects, and then use the spawn location as the set object location that your spawner would have used anyway.