Yeah I mean mine would pump up when I started the car when it leaked but I don't think I had it locked, but technically when you unlock the car you are "waking" up the electronics which includes the air compressor.

If the air struts are original I'm sure the one is leaking, do them both. Do you have any errors on the dash? If not, good.

__________________
2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards