Robin's secret identity has never been something that Conner has been especially curious about. Knowing his real name won't change anything that he knows about him as a friend and a teammate. People have a right to their privacy. If he had a real life outside the team, he might be inclined to hide his identity too.

Robin's first remark means a lot more to him, anyway.

"Month, month and a half? I saw you hours ago."

Maybe he's concussed. That can happen to humans.