Continuity mistake: During their first night at the camp, Jojo and his friend are talking while they play with their knives. During the scene the knives change position between cuts (blatant especially when they mention the brussels sprouts or when he rolls to the other side to sleep). (00:08:40)
Continuity mistake: Jojo's mom makes him look at the people hanged in the public square. When they turn around and walk away, between the two shots there are clear changes in position in passersby in the background. (00:20:30)
Continuity mistake: Towards the end of the opening credits, when JoJo and the rest of them are first running through the woods. The swastika is reversed and everything is on their right arms. At the end of the credits, the badges are on the left arms.
Continuity mistake: After Jojo finds Elsa for first time he talks with Adolf in his room, he recharges on the wall then moves a little bit but suddenly is 1 or 2 steps from the wall.
Continuity mistake: When the swimming pool scene is about to end, Finkel raises his arm and hand. A shot later it's lowered.