No sound plays when using Built-In Spatialization or Simple ITD plugins

No audio can be heard when using the Built-In Spatialization plugin. This is a regression from 4.26. Occurs in 4.27 and 5.0.

1) Launch or create a project
2) In Project Settings, select your platform (ex Windows)
3) Under Audio, set the Spatialization Plugin to Built-In Spatialization or Simple ITD (the latter requires the Spatialization Plugin be enabled)
4) In the Content Browser, create a Sound Attenuation asset (Sounds > Sound Attenuation)
5) Set the Spatialization Method to Binaural
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6) Open any Sound Wave asset
7) Add your Attenuation asset under Attenuation Settings
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8) Add the Sound Wave to a level
9) PIE

Expected Result:
 Audio plays and is spatialized

Actual Result:
 No audio plays

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