Reported via AnswerHub on 4.19 and confirmed in Dev-Audio, the Set Allow Spatialization widget in BP appears to not be functioning - as the audio does not become spatialized in playback.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-64641 in the post.
| 2 | 
| Component | UE - Audio | 
|---|---|
| Affects Versions | 4.19.2, 4.21, 4.20.3 | 
| Target Fix | initial ue-audio release | 
| Created | Oct 1, 2018 | 
|---|---|
| Resolved | Oct 12, 2018 | 
| Updated | Aug 9, 2019 |