Spatialization no longer occurs when Non-Spatialized Radius is set above 0

Audio spatialization no longer occurs when Non-Spatialized Radius is set above 0 in a sound actor (instance or in a sound cue).

I could not reproduce this issue in UE4/Main.

1. Open Content Examples in editor.
2. Open the Audio level.
3. In the World Outliner, select the Allow Spatialization Sound actor.
4. In the Details panel, set Non-Spatialized Radius to 1.
5. Play in viewport.
6. Walk to Display 1.3.
7. Walk into the trigger to activate the sound.
8. Move the camera left and right.

RESULT:

No spatialization occurs (audio does not sound as if it's coming from left or right ear).