Effects "leak" when renaming an exposed parameter

To reproduce:
- Open attached project and launch "test" scene
- Open the Audio Mixer window and select "Ambience" Mixer
- Select "SingleExplosion" View
- Hit Play and then "Edit in Playmode" button
- Select "Explosion 1" audio group
- Open the "Exposed Parameter" list
- Rename the parameter and press Enter
- Observe that there is a small audio "leak" from the Audio Mixer mix when renaming