The contactor on our 2014 gas Newmar was sticking and did exactly what you describe. That's the big relay on the hydraulic motor that powers it. Strategic rapping on it worked to unstick it. Don't use metal, or be careful not to short the wiring.
It's also possible the wiring between the controller and contactor is faulty.
There's three small leads going to the contactor to control it. -Ground, +up, +down. With a meter or test light check to see if the contactor is receiving the +12v signal to extend the jacks.
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Newmar Ventana 4037, 2023.
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