@Puma not sure if I got right what you are saying, inbound dispatch after passing through security scan goes first down and then up to serve the upper bays (yes I use tilt trays and high speed belts). What I think you are talking about is outbound dispatch (to baggage claim), which has a different path).
Yes I also think this is not 100% efficient in terms of time, but if you continue reading you see problem is for late check in (actually lead time from check in to bay is sufficient with schedule on time)
Excuse multiple posts but I think I got it (screenshots are in time order)
Step 1: truck has loaded baggages for flight SF113 (and has loaded some)
Step 2: check in for flight SF113 still ongoing and running late, so there are more baggages to come but truck has already left…
A baggage is going to bay with truck already enroute to stand
Step 3: suddenly baggage loading figures as completed with 0 baggages, but truck in step 1 left for sure with some cargo from the bay…if I look for the truck with loading task assigned it has disappeared (I usually click on stand and look for the vehicle with yellow marker which is doing loading task…no way to locate it). I think this has been triggered when late baggages got to the bay
Possibly a weird behaviour of the system?