KiteDemo: DestroyActor Warning when Saving - Height_x3_y2_C_1

While testing in KiteDemo - //UE4/Release-4.16 CL 3420042 in Binary – When the editor autosaved I noticed a warning occurred in the output log. – Issue occurs during any Save operation. User can use 'Save All' button to repro.

LogSpawn:Warning: UWorld::DestroyActor: World has no context! World: height_x3_y2, Actor: /Game/Maps/GoldenPath/Height/Height_x3_y2.height_x3_y2:PersistentLevel.Height_x3_y2_C_0

This is Not a regression as it occurs in 4.15.2 Binary as well.

Repro Steps:

1. Have Kite Demo downloaded
2. Launch Engine Version being tested
3. Open Kite Demo project
4. File > Open Level > GDC_Landscape_01 (Map is located inside Content/Maps/GoldenPath)
5. Select Window > Levels
6. Right click inside Levels window and select Select All Levels
7. Right click inside Levels window and select Load
8. Open the Output Log
9. Click Save All in the Content Browser
10. Wait for Save to complete

Result:
Save completes with 1 warning
Expected Result:
Save completes with no errors or warnings
Frequency:
3/3 - 100%

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