Actors Do Not Remain Attached When Sequence is Saved and Reopened

Link to youtube video of workflow: (Link can also be found in UDN post)
[Link Removed]

Spawned actors do not stay attached following the method above when the Sequence is saved and reopened

1. Create a new project in 4.18
2. Create a new level Sequence
3. Drag in two different basic static mesh actors (such as a cube and a sphere)
4. Add the Cube and the Sphere to the Level Sequence
5. Convert the Cube and Sphere to Spawnable
6. Attach Sphere to Cube by (Right click Sphere < attach to < Cube)
7. Move Cube around to see that the assets are attached
8. Save Sequence
9. Reopen the Sequence and see that the actors are no longer attached

Expected: Actors stay attached
Results: Actors do not stay attached to each other

Fix UE-51650

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