I’m not having any trouble with this functionality. Since you’re working with FMod, I went ahead and did a search and found a very similar question, it might even be yours: [FMOD folder doesn't copied on UE 4.13 - Unreal Engine - FMOD Forums][1]
Basically, since you’re having trouble with the FMod plugin not working properly within the editor, but the functionality in the editor is working properly - it means you’ll need to speak with the creators of the plugin.
Thank you!
FMOD folder doesn't copied on UE 4.13 - Unreal Engine - FMOD Forums