Can't Play Sound in PIE

I have strange error on my project. When play it in PIE, there is no sound ,except the sound of the UMG button. However, play in Standalone, everything is fine (BGM and FX is playing). In the older version 4.19.2 , The sound is also playing. The packaged project, standalone and Real time Audio in editor have no problem. This misbehavior is only on plating in Selected viewport, PIE and Simulate. How can I fix it?

To viewer, i am so glad.
This problem is fixed by 4.20.2.