[Audio Gameplay Volumes] - Sounds in lower priority volumes are not treated as exterior when when listener is in the overlap

When two volumes with the same component type overlap, sounds inside the lower priority volume are not behaving correctly. In the diagram below, the Blue volume has a higher priority, but when the listener is in the place that the volumes overlap, the sound in the Green volume is not treated as outside the volume. 

If the Attenuation component on the Green volume is deactivated is it treated as outside. 

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1) Launch AudioQA
2) Open the map AQ_AudioGameplayVolumes
3) PIE
4) Navigate the camera to the Priority test stand
5) Enter the middle of the stand, where the Green and Blue volume outlines overlap 

Expected Result:
 The Female Voice sound is treated as exterior to the volume with the higher priority (Blue) component and is attenuated (made quieter)

Actual Result:
 The Female Voice is not attenuated.