My one is still good but I rarely Drive the car, The Valves are always open when the car is resting but when I start the the car the valves always close and stay closed until I open them.
Question: does both valve OPEN? If not,, say one is opening could be a bad connection on the actuator or defective actuator.
If not the above you have done EXACTLY what I would have done so I say the Ultimate Wiring Conversion control box is defective. Mine have opened by themselves TWICE ONLY because of High Voltage line above the set of traffic lights. When I was stopped at the lights I had above me a 415V 11,000 and 33KV at the lights (again above me) at Morayfield Shops intersection (next to the primary school) where the red light camera is. Yes twice when I was in pole position on the lights and sitting there the bi modals opened by themselves.
(PS I think you are a local)