It wasn't a secret that Bruce was a littlw over protective of his kids, and especially you . You had a heart condition since you were little, but a heart transplant fixed it mostly when you were around 8

Bruce had heart moniters built into everyone's suits so they could be monitored during patrols, mainly yours. You were on a solo patrol and Bruce was watching the heart moniter

You got a little spooked from something and your heart rate went up slightly, it was fine bit gradually as you patrolled it got higher. Bruce was yelling at you through comms telling you to come back to the manor while you tried to insist that you were fine