Update. It looks like there is a problem between the #3 fuel loading and #4passenger loading, If done in order. I have tried in several instances and same problem. Between after the fuel load and calling for passengers after scenario's complete or done in queue, I can see the baggage trucks parked but do not move in the distance. Cargo vehicles move to aircraft but do not raise to load the cargo. Passengers will board.
However Scenario"s that will complete in full to pushback.
KATL, MDPC, KFLL airports
Aircraft state. Turn around state, 2420 kg fuel loaded
Load Passengers 130 1.5 Cargo on instant or progressive in cdu.
gsx defaults choices, or custom
1. Call fuel truck, load 10.5Kg fuel on progressive load OR instant load in cdu. GSX calls fueling complete.
2. Call for Catering. GSX calls complete.
3. Call for Boarding and passengers. Rear Stairs, Cargo loaders move and raise to aircraft, Passengers load, baggage loads. Scenario Completes
4. Push back and departure.
Done either in queue or waiting for completed scenario.
I hope this helps, I can not be any more accurate that this.