There is a problem with the sound update when using "Sound Attenuation" in the Animation Editor.
In the Animation Editor, if the mouse cursor is located in a viewport and you change the position of the camera by adjusting the mouse wheel without clicking the viewport, the Sound Attenuation will not be updated to the position of the camera. Sound Attenuation is updated as soon as you click the viewport.
I will attached video for that issue.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-80928 in the post.