Spawned actors are in the 'persistent' level and will not automatically go away when levels are streamed out.
Dynamically spawned actors do not seem to be removed when unloading a streamed level that they were spawned into.
Result: Notice the geometry behind the floor disappear when Sub1 is unloaded, but the dynamically spawned Red cube does not get unloaded with the level
Expected: The dynamically spawned cube would be removed when the level it was spawned in was unloaded.
Head over to the existing Questions & Answers thread and let us know what's up.