So, I have the same problem as this Wwise user, but their fix isn't applicable for me.
https://www.audiokinetic.com/qa/5629/custom-script-unity-using-reference-commited-through-smartsvn
I believe it has something to do with version control. We use Sourcetree to sync up our Unity projects, and when others make changes to prefabs and/or scenes, they lose their inspector references to Wwise.
We've been checking meta-files and nothing seems to show the reference getting lost...
Needless to say, this is very time consuming and annoying.
Trying the fix the above-mentioned user suggested doesn't work either, because - I don't have the folders they are mentioning?
Following the path they suggest I see an API folder, Deployment folder, etc. But no Ressources folder. And there are no Wwise folders in the Assets/Ressources hierarchy. So I can't use their fix for the issue.
Thanks in advance for any help on this matter.