Continuity mistake: Alfred is freaking out about Diana's sub-par tea brewing skills. He tells her that there's enough tea; Gal Gadot's fingers are in a different position on the container between shots. (01:34:30)
Continuity mistake: Steppenwolf sends away the parademons saying "This one will be mine" to confront Wonder Woman one-on-one. She says in close-up "I belong to no-one!" and her right shoulder is clear of hair, but in the previous shot she had hair right in front of that shoulder. (01:57:20)
Continuity mistake: After the underground battle with Steppenwolf when they are finally joined by Aquaman, Wonder Woman sums up the situation with "All he needs now is the Lost Box of Men." Batman replies "If he doesn't already have it" in another shot, where Diana's hair is missing in front of her shoulder. (02:08:25)
Continuity mistake: During the gravedigging scene, Aquaman offers Diana a swig from his flag, who turns it down. Momoa lowers his arm in one shot, and Gadot turns towards the others. In the background in the next shot, Momoa is lowering again his arm, and she is looking ahead. (02:22:55)
Continuity mistake: After the gravedigging scene, a man in an orange coat tells Dr. Stone that the contamination tests came out negative. He is holding the clipboard by his side, in front of him, by his side again. (02:25:25)
Revealing mistake: When the military security checks Flash's phony badge, the name on the personnel list to the right does not match the fake identity; Barry's false identity is "Rowe, Wesley", but in the list the name "Band, Ryan" is highlighted. This mistake was not present in the theatrical 'Whedon' cut where the name was altered to match. (02:27:05)
Continuity mistake: When Wonder Woman says "He's back" looking at the freshly resurrected shirtless Superman, the policeman by the patrol car is leaning against it differently compared to the previous line-up shot; he was lowering the hand with the radio, then talking on it. (02:40:40)
Continuity mistake: When Lois randomly appears on the battlefield, she drops the handbag while one of the policemen tries to restrain her. The bag is behind the original position when the shot changes. (02:46:50)
Continuity mistake: After Silas is killed, in the wide shot Cyborg is standing mostly upright in front of Flash. Cut to a closer shot and he's bent over. (02:51:45)
Continuity mistake: When Superman is hugging his family, Martha has suddenly at the cut her hand on his sleeve when he says "Listen, Ma..." (03:01:15)
Continuity mistake: Steppenwolf begins to synchronize the Mother Boxes, and the event is perceived in Themyscira as well. The amazon that spots it has her left arm straight then bent in the reverse shot. (03:04:55)
Other mistake: Apparently, one of Aquaman's superpowers must be to be super-heavy, since surfing on the body of a parademon he lands on a five story building and that somehow slices the whole building in half, complete with explosions that leave him unscathed and don't turn the parademon's carcass into a pulp. (03:15:15)
Continuity mistake: Alfred notices in his drink the disturbance caused by Superman's approach and pauses his work to stare at it, but in the next shot when Supes lands he is still working on the engine. (03:17:25)
Continuity mistake: Superman is pummelling Steppenwolf, and Darkseid's portal starts appearing. Wonder Woman turns around to face it in two shots; Aquaman in the first shot has the trident standing vertical, it's more slanted forward in the next. (03:24:45)
Continuity mistake: When Wonder Woman readies her sword (which makes also a sound) in front of the portal to Apokolips, wind blows her hair behind her back in the frontal view. Cut to the view from the back, and the hair is in front of the shoulders. (03:24:55)
Continuity mistake: When Aquaman like a true hero impales the bad guy from behind, Superman in the background is assuming the stance raising his fist. In close-up his arms are both lowered. (03:30:25)
Continuity mistake: When Flash talks to his dad at the end of the movie, he puts a paper against the security glass. The paper is tilted towards his right a bit, but in the reverse shot it's tilted more heavily and in the opposite direction, and so it stays for the rest of the scene. (03:37:05)
Continuity mistake: Clark is thanking Bruce for the house. They both look in the distance at Lois and Martha; there are a couple guys fetching boxes near the carpenter, on both sides of the workbench, but they are nowhere to be seen in the new closer angle. (03:38:00)
Other mistake: After realising they can track the mother box, Batman says they have to go back to his base to use one of his satellites to track it, and they all do so. Which completely ignores the fact that Cyborg could easily access the satellite feed directly using his abilities and display it to the others on any nearby screen in Star Labs.
Suggested correction: Just because he had many options available to him, does not mean that the option which he chose was wrong.
Other mistake: Barry comes back to his home, replaces the fuse in the fuse box, flips the handle (begs the question of why remove the fuse AND turn off the switch, but whatever), and within 2 seconds every screen in the place is lit up. Sure, a TV might come on that fast, but plenty of those screens are showing data, analysis, etc, running off computers, which would take longer than that to boot up and get everything running.
