Continuity mistake: When Tris saves Christina from falling and then rolls on to her back you can see her sports bra underneath. In the next scene, she and Tobias have a brief sex scene where she removes the same top, but there is no bra underneath.
Continuity mistake: When Four bangs on the table and the silverware is jostled, there's nothing under his arm or by the plate. In the next shot of him a spoon is next to his arm and the plate. And when he is leaving, items on the table change too, such as the position of the glass of water that was next to Tris.
Continuity mistake: Divergent and Insurgent take place after one another it makes no sense that Jeanine goes from wearing dark blue to a lighter blue as she does here.
Continuity mistake: After Tris cuts her hair, she and Four are talking. Tris' hairstyle changes every time the camera angle changes, with no action to account for it.
Continuity mistake: Tris overpowers Peter in the testing chamber. After Jeanine says that she has enough guards, Tris pushes him away and turns around. A second later Peter is in the control room with Jeanine, his face already cleaned and without blood. (01:54:20)