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1) Accept multiple Hauling missions where A und B Point are the same location f.e. Collect at Rykers and Drop Off Bajini.
2) Unload more than one Cargo Type on the Freight Elevator to complete 2 missions at once.
3) Elevator recognizes Cargo for 2 missions correctly -> Lower the Elevator.
4) 2 missions complete and you get the payout. -> Bring Elevator up again -> One of the cargo batches comes up again
5) You can then lower the Elevator again and the cargo goes into your station inventory and sits there forever.

What happened
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When completing more than one hauling mission at the same time on the same freight elevator cargo does not get removed from freight elevator correctly after lowering the elevator and bringing it back up one batch of cargo will stay on it despite the mission showing as completed.

What should have happened
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When completing 2 or more hauling missions at the same time after lowering the freight elevator and bringing it back up it should be empty.

Workaround
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Completing one mission at a time even if the drop off point for al active hauling missions is the same. Unload one batch of cargo -> Lower elevator -> complete mission and bring elevator back up -> unload next cargo batch -> repeat until all missions are completed.