Visible crew/equipment: In the club scene when Polka Dot Man is dancing, when the camera spins around you can briefly see the top of a camera/gimbal.
Continuity mistake: Dubois is holding Waller at penpoint, but when he comments sarcastically "A little extreme?" Idris Elba is pulling the arm back. Yet in the next shot the pen is still pointed at her jugular. (00:18:55)
Continuity mistake: When the people in the control room wake up and find out there's "A freakin' Kaiju", the clocks are showing entirely different timezones from the previous instances, with a wild difference from one another (earlier they were a couple hours apart, now we have even 9 hours), and none of which matching the time when the action supposedly takes place (it was late morning, past 10 AM as shown by the surveillance room clock and the phone in the hands of Harley's torturer). (01:46:45)
Continuity mistake: After killing the guards all around her, Harley rushes into the next room, kicking the door open, and begins fighting in close quarters with more. She breaks the arm of one of the guards who tries to stab her through the bars. In the sequence, the red wrap is covering her fingers in one shot, it's underneath them in the next. (01:12:15)
Continuity mistake: Bloodsport is talking to his daughter about her crime. During the conversation, the continuity between shot and reverse gets jumpy at times; for instance when he mentions that she "dragged out the paternity test" Idris Elba stretches out his arm only to be still when his daughter screams at him. Later on he reminds her he told her to do 'her thing' and gesticulates with the right hand, but his arm is still and low in the next shot. (00:00:17 - 00:16:50)