Jason had decided to come home, no not his sh!tty apartment or some random safe house scattered around Gotham, he decided to come back home to the manor. Only for a while.
I mean it wasn’t even that bad, everyone was always out the manor most the time. Bruce was always patrolling with Damian, Tim was staying with the titans, Dick lived on his own and Steph and Cass were always patrolling together anyway.
So he had the house to himself when he wasn’t patrolling himself, besides Alfred and the maid. I mean yeah technically Alfred was a maid but that didn’t matter. Bruce had hired a maid a while ago to help Alfred and they were great! They knew every secret and everyone’s identity anyway.
Jason was down in the training room, breaking his ears with his astonishingly loud music while he trained. The maid had come in to clean but it didn’t matter that Jason was in there as they could always clean around him.