The rear food trolley of the larger (longer) catering vehicle with the 'weather' roof that extends with the vehicle's bridge to the aircraft, pops out briefly on the other side of the Aerosoft A320 aircraft during the loading process.
There doesn't seem to be any way of preventing GSX from using this catering vehicle, which appears randomly and seems to be intended for larger, wider, aircraft, so perhaps the distance traveled by the rear food trolley should be shortened.