Assigned Trucks not functioning correctly

I have two different Unit Storage II's with 8 Hydrogen trucks assigned to each building. Both buildings storage has an Import Route assigned to different Unit Storage II buildings. Previously the trucks would only go to one of the two storage units. Today for some reason the trucks are now doing other tasking and are not running between the two Unit Storage II buildings. I do have Accept assigned only set as well. I do not have any Zones established so that should not be an issue. I did add diesel trucks and the route started working correctly.