I don't believe JB knew she didn't get a rail. The commentators had been talking about how long of a day it had been for the players. I think they both snoozed it, as did many people watching.
I think you have to give JB the benefit of the doubt in this situation instead of calling her out when you really have no idea what she was thinking at that moment. JMO.
I am on your side. I saw nothing from JB's reaction to make me think otherwise.