Audio Attenuation falloff is applied even when turned off

Enable Sound Attenuation in the Sound Attenuation class does not appear to work. Specifically, unchecking the box doesn't turn it off. This is new - the setting worked in 4.18.3.

1. Create a new project.
2. Place an actor with an audio component in a level, e.g. an AmbientSound actor. Assign a sound that starts playing when the level begins.
3. Give the sound from the previous step a Sound Attenuation object. In that object, turn Enable Volume Attenuation off.
4. Notice that attenuation still applies. You can turn Enable Volume Attenuation and adjust the values. Those new values will take effect whether or not you turn Enable Volume Attenuation back on. However, removing the Sound Attenuation class from the sound will have the intended effect of the sound being audible at full volume everywhere.

The expected result is that the attenuation distance would not have any effect on the volume of the sound when Enable Volume Attenuation is turned off.