StrategyGame audio is inconsistent between PIE and Standalone

Audio is inconsistent between PIE and standalone game. When the user is in PIE, attenuation appears to be working as expected, but when in standalone game there appears to be no attenuation.

1. Open Strategy Game in UE4
2. PIE
3. Select an empty tower and select a fire tower
4. Once the fire tower is complete, click and hold down on the tower to charge it
5. Release the mouse button (fire audio is playing)
6. Zoom in on the fire tower
   Result: Fire audio is louder as the camera zooms in.
7. Exit PIE
8. Select standalone game
9. Select an empty tower and select a fire tower
10. Once the fire tower is complete, click and hold down on the tower to charge it
11. Release the mouse button (fire audio is playing)
12. Zoom in on the fire tower
    Result: Fire audio stays at the same level even after zooming in.