Bug with ScriptableObjects using [SoundGroup]

Unfortunately I don't have access to the newest version of the Asset, but I can give the steps to recreate the issue.

1. Create a scene with the MasterAudio prefab in it, and create 3 unique Sound Groups.
2. Create a Script like the one I posted above, inheriting from ScriptableObject, with variable using a [SoundGroup] Attribute, and a CreateAssetMenu attribute so you can create assets of the object.
3. Via the context menu in the project explorer (in the example code, Right Click > Test > TestScriptableObject) create 3 assets of the ScriptableObject.
4. Select each asset individually, and assign each a different one of the Sound Groups.
5. Observe that they are all correctly storing their own individual Sound Group.
6. Select all of the ScriptableObject assets at once, then deselect.
7. Observe that all of the individual assets' Sound Groups have now been set to the group of the most recently selected one.


If it's any help, I believe I have fixed this locally in the project this is being used in by adding this to the beginning of the OnGUI method of SoundGroupPropertyDrawer.cs:

public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
{
//Disable Multi Object Editing - Values were being overridden by most recently selected objects
if (property.serializedObject.isEditingMultipleObjects)
{
EditorGUI.BeginDisabledGroup(true);
EditorGUI.LabelField(position, label.text, "Cannot Multi-Edit Sound Groups");
EditorGUI.EndDisabledGroup();
return;
}

//The rest of the OnGUIMethod...
}