Always, always, always add your BP to your "wallet" (Apple iOS talk) once it's generated by the app. This will always get you through security, even if you are removed from the flight. The bar code only gives name, TSA PreCheck status, flight info, etc. but does not actively link to the airline reservation system to check if you're still on the flight. Meaning...you can get through security with the BP and then sort out any flight issues at the gate or the customer service area.
-RM