Continuity mistake: In one scene after Hutch is beaten up on the bus, he has no facial injuries. Then in the next scene, they are back.
Continuity mistake: In the 1978 flashback scene, Michael does not have 6 bullet wounds in his chest from when Dr. Loomis shot him moments earlier.
Continuity mistake: When Gilgamesh hammers the Deviant into the gates of Babylon, dealing the last strike after the dramatic pose, the shadows cast by the statues don't go much further away than their pedestal. In the following long shot the 5 Eternals have a massive area of shade behind them that extends very far away from the city walls. (00:21:30)
Continuity mistake: Doc Ock is supposedly from Spider-Man 2 yet here he's gained a sweatshirt or turtleneck whereas in that movie he didn't have one. It's made clear he was pulled from his timeline just before his death, so he should be wearing the same thing.
Continuity mistake: While at Dino Stop, Katie convinces her dad not to play it safe and to take a chance to save the world. Rick agrees and extends his left hand for the "all hands, Mitchell family on three." In the closeup we see Katie put in her right hand, but in the wide shot Katie's left hand pulls out. Also, note that in the closeup both Katie's and Aaron's positions between their parents are switched. (00:45:00)
Continuity mistake: Toward the end of the film Ruby says goodbye to her family and gets in the car to head to college. The car pulls away from her home and drives for about 5 seconds when Ruby yells "stop the car". She exits the car which is positioned nearly exactly where it was when they started on the families' property.
Continuity mistake: The duct tape placed over the cut on the Janitor's left cheek is inconsistent in appearance many times. Initially, the piece of duct tape torn off the roll has a small piece missing on the lower right-hand corner that isn't there afterwards. Sometimes the lower edge of the duct tape is rippled (wavy), other times it is flush with the skin. (00:23:11 - 00:27:11)
Continuity mistake: Throughout the entire movie, Porsha's fur keeps changing from a light blue to a dark blue.
Continuity mistake: The right side mirror on the car is broken off by a tree in the maze, then returns. (01:06:20)
Continuity mistake: During the opening scene when the family is driving down the road, a newer McDonald's can be seen on the right-hand side.