I had accidentally placed all the field object files inside the base models category of Field Models - Non-Player Characters, so if it was loaded above Field Models - Objects, then it would take priority. I have fixed this with an update to Field Models - Non-Player Characters version 2.2 by removing all the field object files from its base options.
Deactivate and Uninstall Field Models - Non-Player Characters version 2.1, then select Workshop -> Check subscriptions now. You can no click the Update button to download and install Field Models - Non-Player Characters version 2.2.
Enjoy