Continuity mistake: When Maddie is coming up with an ending to her novel, she opens one of the ending drafts. Not long after opening the draft, she decides to go on facetime and make a call, whilst the draft is still open, then the man she is trying to contact calls her back. She then closes the laptop and tidies up. When she returns and opens up the laptop, the draft that was just shown on the laptop has become a completely different one.
Continuity mistake: Maddie kills the intruder with the corkscrew and then pushes him onto the floor to her left. A wide shot from above shows them lying side by side; Maddie's left hand is lightly touching the intruder's right elbow, but her hand is definitely not under his arm. Then the shot switches immediately to a closeup, and the intruder's arm is suddenly on top of Maddie's hand and wrist. You can see her pulling her arm out from beneath his.