The flight was scheduled to leave at 12:35. The checkpoint was closed just after noon, which means that when they closed the checkpoint, she had not yet cleared security.

This woman who missed the flight and posting about it all over the place I feel did not leave enough time to get to the gate. I don't feel that getting to the checkpoint with less than 30 minutes to flight time is enough time, even without the candy bomb.

Even if she was the first person back in line once they started screening again at 12:30, she still would have missed the 12:35 flight.