Child Actor Components are visible in editor but disappears while playing or simulating.

Child Actor Components are visible in editor but disappear while playing or simulating. On BP_Cube_Row, setting 'Hidden in Game' to true then false during play will make the object appear.

Repro Rate: 3/3

Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did not occur there, it is a regression.

1. Create a new Third Person BP project
2. Create a new Blueprint based on Actor, naming it "BP_Cube"
3. Open BP_Cube and attach a Cube Component as the Default Scene Root
4. Save, Compile, and Close the BP
5. Create a new Blueprint based on Actor, naming it "BP_Cube_Row"
6. Open BP_Cube_Row
7. Add a Child Actor Component
8. In Details, set the Child Actor Class to BP_Cube
9. Save, Compile, and Close the BP
10. Place BP_Cube_Row into the scene then Play in Editor

Results: BP_Cube_Row disappears from the scene upon playing in editor.
Expected: BP_Cube_Row renders out and can be seen by the player.

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