Having a similar issue, but don't have even 200 pax loaded. I've set the options for GSX in LOAD AND FUEL but when the loaders arrive they don't animate (lifts don't rise, no cargo movement). They do park in the correct spots.
Also, the rear cart/train has only one pallet carrier.
GSX working fine so not sure if this is a bug in the 333 or if I'm missing a definition for the plane and just need to create/download a GSX profile for it...? Thx!