In editor, sub level instance's streaming state persists incorrectly after toggling Level Behavior without saving

When adding a sub level with world partition streaming to a main level where the streaming is also enabled, setting* Level Behavior* of the sub level to Standalone, and saving the result, in the first editor play all belonging actors are loaded / unloaded while following the sub level's world partition settings. However, after switching the behavior to Embedded and reverting back to Standalone but this time without saving, when entering the second play child actors in the sub level are unexpectedly unloaded while following the main level's settings.

1. In the editor, create a new empty Open World level named “SubLevel”.

    o Place two cube actors: one at location (0, 0, 0), and another (Cube2) at (3000, 0, 0). 

    o In World Settings, set Main Layer's Cell Size to 1600 and Loading Range to 2000. 

2. Create another Open World level named “MainLevel.” 

    o Reset the PlayerStart rotation to (0, 0, 0). 

    o In World Settings, set Main Layer's Cell Size to 6400 and Loading Range to 2000. 

3. In “MainLevel,” add “SubLevel” as a level instance.

Transform the sub level's location to (-170, 70, 0)

Set its Level Behavior to Standalone.

Save both the actors and the level. 

4. Play “MainLevel”, and press the W key to move from the Cube to Cube2’s location. 

Confirm that both the SubLevel instance actor and Cube2 become visible. 

Then stop the game. 

5. Reopen “MainLevel”, change SubLevel's Level Behavior to Embedded, and save the actor. 

Then change it back to Standalone without saving the actor, and play the level. 

6. As you approach Cube2 from the starting Cube, Cube2 appears shortly and then disappears. 

The SubLevel level instance actor is not properly loaded. 

Results: The behavior of the level instance used as a sub world partition differs between step 4 and step 6, despite having the same settings.

Expected: A level instance operating as a sub World Partition should function independently from the loading behavior of the main world.

7. After quitting the game, if you save the SubLevel level instance actor, it will behave as in step 4 during subsequent play sessions