From what I understand that problematic NFS version is from the OS you would be using to house your files, and not OSMC. However since it has been confirmed that the issue only arises with using Kodi NFS paths and not system mounts then the path of least resistance while waiting for the fix would be to just make a system mount…
and then put a path substitution in an advancedsetting.xml file to make your existing Kodi configuration and library redirect to this system path.
Please note with this type of change you should NOT change your source paths in Kodi.