1. In 42 years as an RV tech, I have NEVER heard the term Stanchion to describe any type jack system:B
2. You do not state Year/Brand/Model of RV. Also do not state Brand and/or model of Jack system.
3. Now, to answer your question. You do not have Retract springs, that means you have Hydraulic DOWN and UP. These type systems have a Hydraulic Pressure switch, that when all 4 jacks are fully retracted, the Switch opens once the Hydraulic pressure goes over about 2200 psi. Once this switch is satisfied, the system shows retracted and system shuts off.
4. 2 things will cause your problem. 1. System loses that hi pressure because of a external or internal fluid leak, which will NOT cause a jack to extend, but causes that pressure switch to open. When you turn on the RV, the system sees that loss of pressure and does a Automatic retract to restore the pressure on the PSI switch. 2. The pressure switch itself is defective and relaxes after a few days.
5. IF no external fluid leaks, I would not worry about it. Just a minor annoyance and not worth spending money unless it gets worse. Doug
PS. Power UP and Power down means it takes Hydraulic pressure to keep them FULLY retracted.