Child Actor component is duplicated in Standalone Game

Child Actor component is duplicated in Standalone Game. No other play modes or packaged game are affected. The additional actor will disappear after 1 minute.

*This is a regression:

Doesn't occur in: 4.13.2-3172292

Occurs in: 4.14.3-3249277*

1. Open QA-Game
2. Create an actor class bp named BP_Child & open it
3. Add a basic shape Sphere component
4. In the Details panel, enable Simulate Physics
5. Create another actor class bp named BP_Parent & open it
6. Add a Child Actor component
7. In the Details panel, set the Child Actor Class to BP_Child
8. Back in the editor, place BP_Parent into the level
9. Play in Standalone game

Results: There will be 2 BP_Parent actors in the level. After about 1 min, one of the actors will disappear.

Expected: For only 1 BP_Parent to be present during play.

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