I am not sure what exactly is happening but one of them is wrong. either the truck drivers are on strike or dispatch left the wrong switch on while on break. in the picture you can see vehicle info reports heavy work load for trucks AND six trucks sitting idle next to a silo. save is attached.
I do not. quite frankly I have no idea how to set up a logistics zone. every time I tried it's an incredible frustrating experience. so no, absolutely certain, I do not.
if you check my save, it's rather early in the run. just upgrading to yellow science. I am fairly certain there's nothing yet, trucks can't reach. at least nothing that I didn't do exactly the same in any previous version without issue.
Looks like this is a regression introduced by the new system to exclude entities over the ocean from normal deliveries.
The stacker tower extension can't be constructed because there are no amph. vehicles and the new system doesn't recognize that i can deliver directly to the tower (which is on solid ground).