I am experiencing the same problem on bionic.
My system is an upgrade from artful.
The NFS shares are mounted at: /media/sharename
I don't know whether it is relevant, but I am still using the Unity 7 desktop on bionic.
The shortcuts of the NFS mounts were visible in nautilus on artful, where I was also using the Unity 7 desktop.
I am experiencing the same problem on bionic.
My system is an upgrade from artful.
The NFS shares are mounted at:
/media/sharename
I don't know whether it is relevant, but I am still using the Unity 7 desktop on bionic.
The shortcuts of the NFS mounts were visible in nautilus on artful, where I was also using the Unity 7 desktop.