Second Vessels spawned with VesselMover have has no lift bug. Not sure which mod is the problem though, Just confirming what @qromodynmc was experiencing.
Repro: using VesselMover https://github.com/PapaJoesSoup/VesselMover/releases spawn a second vehicle, second vehicle has no lift.
screenshots with FAR Flt Data shown:
https://sli.mg/a/FoSKzj
Workaround Second repro involves 3 load screens. Load first vessel normally, use vessel mover (or not) to place it off the runway/launch pad. Return to Space Center, enter SPH/VAB, select vehicle and launch. Switch back to the first plane ([,]), it has no lift as in the screenshot below:
This behavior breaks AI pilots/multiple aircraft.
*Re-read qromo's post and edited.