MasterAudio could not find sound when using a Dynamic Group.

Hi, I'm getting the following error when playing sounds from a single scene:

MasterAudio could not find sound: Quadruped_Groan. If your Scene just changed, this could happen when an OnDisable or OnInvisible event sound happened to a per-scene sound, which is expected. Triggered by prefab: Avatar_Biped_00 4
UnityEngine.Debug:LogWarning(Object)
DarkTonic.MasterAudio.MasterAudio:LogWarning(String) (at Assets/Plugins/DarkTonic/MasterAudio/Scripts/Singleton/MasterAudio.cs:5093)
DarkTonic.MasterAudio.MasterAudio:PlaySoundAtVolume(String, Single, Vector3, Nullable`1, Transform, String, Boolean, Single, Boolean, Boolean, Boolean, Boolean, Boolean) (at Assets/Plugins/DarkTonic/MasterAudio/Scripts/Singleton/MasterAudio.cs:1319)
DarkTonic.MasterAudio.MasterAudio:PlaySound3DFollowTransformAndForget(String, Transform, Single, Nullable`1, Single, String) (at Assets/Plugins/DarkTonic/MasterAudio/Scripts/Singleton/MasterAudio.cs:1126)
DarkTonic.MasterAudio.MechanimStateSounds:OnStateEnter(Animator, AnimatorStateInfo, Int32) (at Assets/Plugins/DarkTonic/MasterAudio/Scripts/Events/MechanimStateSounds.cs:22)

Doesn't make sense since I'm testing this from a single scene, without any scene change. The sound group is being triggered from an animation state using the Mechanim State Sound script. I see that the sounds included in the discrete dynamic sound group are being triggered, but not being populated to the Master Audio prefab, thus there is something missing  there. Do I need to link this dynamic group somehow to the Master Audio prefab? Please help.

Using Unity 5.2.1p2, and last version of MA from the Unity Store

Thanks

Rodrigo