No, it's just a basic "folder sync" AFAIK.
Yes network drives over vpns in user-context can be tricky. Windows tries to mount the drive during login and if the VPN isn't up the drive will be disconnected, most file level operation outside the shell Explorer will fail.
You could look at Offline Files perhaps, but then you probably need an active directory with proper domain account and kerberos (don't know if you're using ntlmv2 on a workgroup server or just using a different account for share access).
If you're using this on a personal computer, there's probably easier solutions, like cloud sync, some simple webdav-server at home or Syncthing