Until you get transferred and the TSA check magically vanishes before you can update it in their app.

Yep, nothing is perfect, that doesn't change anything though.

Except sometimes the TSA precheck and regular lines are the same and they give you this little placard that sometimes a guy behind the conveyor belt will agree means you don't need to take off your shoes and belt...

Yep, sometimes life sucks. Doesn't change my point.