During the Ouija board scene, the glass smashes. During the shots that follow the glass is visible on the table in the background, completely whole.
After Webster knocks the bike over, it changes position.
Position of the letters on the board, when Annie goes back for her inhaler.
The position of Liam's arms, on the pane of glass.
The blood on Becker's cheek, as the Djinn kills him.
When Liam sets fire to the djinn, we can clearly see it is someone wearing fire resistant clothes.
When the Djinn drops Joe's body on the floor, Joe's neck is still pulsating.