I ended up re-flashing the sd card and switching over to the hosted farmbot and that solved the problem.
The farmduino peripheral / motor toggling happens when there is no sd card installed, or when there was an sd card with networking set up and user logged in but no mqtt connection between the farmbot and the web app / server.
I’ll play around with it a bit. I bet there was an update or I had a misconfiguration with the mqtt to server ports. (I had been hosting the older 1.4 farmduino version locally, but it was an old version). If I figure out what I had done incorrectly, I’ll post here.