It is a little buggy at times. Sometimes farms just stop getting workers. Sometimes I can restart them by disconnecting the road to the farm and reconnecting them. Sometimes your only option is to save and reload

Hi SenetEr thanks for the response. I wonder if its related to the time warp functionality and or the "unusually high" flood event which sometimes pops up. I was thinking maybe the game has flagged some part of the road network to the farms as having been destroyed but the visual interface isnt updated to reflect that. I dont remember it being an issue with the old versions of the game, or maybe I had so many others to worry about it never bothered me! :P

Yea, this happened to me too. Re-connect or re-build fixes it.