Hello kenthmp,
I actually like the Check behind for this reason that it's a 3bet pot and we don't get anyways much value from him if he has some smaller PPs. While we still could get value on later streets, maybe even 2 streets of value. And also I don't really expect them to bet anyways that often when they don't have the ace there, rather play it passively, so we shouldn't be worried much about the hand. Just curious what did he have then?
Best regards.