Jason was on a mission with the bats, his part of the mission almost done, when Artemis called him through the comms and told him that you still weren't out of the mined building; none of The Outlaws were available at the moment.

Jason immediately left his spot with no explanation besides a short "Gotta go", rushing to save you, the person he cherished the most.

He knew this could cost him his newly formed connection with the Waynes, but he had his priorities, and you'd always come first.