Sometimes when assigned a source base, AI will drive to the source and not obtain any supplies, despite the base being full of supplies, and then proceed to the resupply mission without any supplies.

Specific case where it happened.

MOB East of Chotain

Source base set to Fishermans Bay Harbor

Destination to Transformer Station

AI would drive to Fishermans Bay then get to the T section, turn around and proceed to Transformer with no supplies.

Changing the delivery destination to MOB makes no difference, the AI logi will go back and forth picking up no supplies and dropping off no supplies between Fishermans bay harbor and MOB.

Changing the source base to Missouri resulted in the AI successfully obtaining supplies, though they proceeded to drive into the ocean just before arriving into MOB.