Hey @Maria A31, currently there's no built-in way for task executers to avoid collisions while doing offset travel to load/unload items. They will try to avoid each other in A-Star if they're on the network, but it seems your larger operators are on their own system. There's a few options you can try to help the 3D model avoid collisions.
One option is to have a separate queue for each operator (in your case, you'll have 4 separate queues). You can use a dispatcher assign pickup/drop-off for each operator so if one queue is more busy than others they won't idle. You can try attaching them to the A-Star system so they can avoid each other while travelling.
Another option is to restrict the number of operators that can load from the queue. By wrapping the Load Task with an Acquire and Release activity, only 1 operator can load at a time. This will bottleneck performance though. Something similar to this would be to put barriers around the queues so then operators can only load/unload from certain locations.
