Yes, I have done this many times, to no avail. The one think I've thought is I could delete all my users and create a new one after running dockersafe.
I have tried (as far as I can tell) all other cominations of Security settings and user permissions, and cannot get full read/write access to SMB shares via Windows or Linux. I can get read access, but no write. If I set Security to "Public" I can get full acces sbut I don't really like this solution, for obvious reasons...