Automatic Changeover Regulator not changing over

Thanks to those who chimed in on this thread. The comments are appreciated.

I did some more research and discovered that some pigtails, specifically those with the green knobs and sold by Camco, have a device located at the green knob that prevents a sudden large flow of gas in case of a broken gas line. LINK. It looks like mine is said Camco pigtail. I ordered a new pigtail and will replace the driver-side one. I'll post the results after I do this.