Can you add the following code before calling GetWorld()->SpawnActor()?
SpawnInfo.bDeferConstruction = false;
I can’t see what else you might set in your FActorSpawnParameters object from that code.
Also, where are you spawning the actors? I’m assuming you’re doing it inside the Tick() function of one of your actors?
The only thing I can think that you could check (and are not already checking) is the bActorInitialized property on your AActor objects.