Continuity mistake: After claiming his iPad, Blanc cautions Miles that "for at least one person on this island, this is not a game." His grip on the top of the chair changes between shots. (00:52:10)
Continuity mistake: At the beginning of the dinner, during Miles' reminder that a murder will be committed, the movements of the guests don't match from cut to cut despite Miles speaking continuosly (for instance, Lionel in close-up strokes his beard and yet in the next shot he isn't and puts a drink down, and same for Birdie, etc). (00:45:50)
Audio problem: Lionel learns that the whole Glass Onion runs on the dangerous power source. He tries to quit, but Miles puts a hand on his shoulder and says "Bro, you are not getting out." Edward Norton's lip movement does not match the sentence. (00:45:20)
Continuity mistake: The first time Lionel confronts Miles about Klear's safety and his involvement, Miles interrupts him pointing his finger at him; it's the palm of both hands in the next shot, and again the single finger when it cuts back to the earlier angle. (00:44:45)
Continuity mistake: When Miles starts telling Blanc about Klear with a K, there's a close-up of Claire staring into space. The glass is held up higher in close-up, she already dropped it lower before the cut. Even more obvious a few moments later when the same angle is recycled after Lionel causes a loud noise. (00:44:20)
Continuity mistake: When Peg nearly drops the glass statue as she observes the override button for the Mona Lisa, she fumbles in different ways between shots; the close-up begins with her left hand practically tucked under her armpit. (00:42:20)
Continuity mistake: When Miles shows Birdie the Hummel figurine that acts as override button for the Mona Lisa, her grip on the tropical cocktail changes between shots. (00:42:10)
Continuity mistake: Miles gives Andi her glass; meanwhile in the background, Claire calls his attention. You can see she is holding her Pinot in her right hand, but the glass switches hand at the cut. (00:41:20)
Continuity mistake: Benoit Blanc chokes on the tamales, which turn out to be spiced up by Jeremy Renner 's hot sauce. He picks a bottle and, still coughing, walks up to Miles. As Miles says "pick your poison", you can see there's no bottle in his right hand, but it is back in the reverse shot. (00:41:00)
Continuity mistake: Andi starts lashing out on the Disruptors; when says that everyone knows who financed Claire's campaign, Kathryn Hahn 's hands switch position on the laptop; her right hand is on top of the left and viceversa. (00:35:15)
Continuity mistake: Andi slow-claps Miles ' speech about the disruptors. She gives her half-drunk bottle to Peg, who is holding it by the base, but in the next shot has one hand on its neck. (00:34:55)
Continuity mistake: As Blanc walks away from the fax the first time he sees it, Birdie Jay is sitting with her legs across Miles ' lap, bathed in sunlight. In the next shot they are in the shade. (00:31:00)
Other mistake: When Blanc points at the fax machine in the mansion, it is printing its journal. The dates shown are from September and October, while the movie takes place in May. (00:30:55)
Continuity mistake: After the small scene with Duke firing his gun in the pool, Birdie's assistant urges her to go talk to Miles. Kate Hudson's hand goes on/off the hat between shots several times in the part of the conversation before she looks at Whiskey and him. (00:29:40)
Continuity mistake: The first time Jared Leto 's hard kombucha is mentioned, Blanc fetches a bottle from the scale model of Baby Blue. Notice Daniel Craig that begins to uncork it. Duke points saying "Iconic!", the angle changes, and now Benoit Blanc has yet to pick a bottle from the porsche-shaped cooler. (00:28:40)
Continuity mistake: Chatting poolside on the lounger with Lionel and Claire, Birdie Jay says "No masks, I can breathe again." Kathryn Hahn was adjusting her suit with her hands on her sides, and suddenly they are on top of the laptop. She then closes the bathing robe, which is open again when Hudson says "Look at this pool." And when Claire started adjusting the swimsuit, Kate Hudson's hand suddenly wasn't on the hat too. (00:00:28)
Continuity mistake: Miles tries to talk to Andi and eventually tells her he is glad to have her there, and touches her shoulder. When he approached her, you could see in the background Whiskey and Duke, with the girl gesticulating. Many seconds pass and Miles asks Blanc to have a word with him; the path appears clear, but in the wide shot that follows Whiskey and Duke are in front of them, and she is making the exact same gesture as before. (00:24:00)
Other mistake: Claire Debella reacts to the biorhythm bracelet buzzing at her wrist. You can see that her wristwatch is set at 7 when it's supposed to be early afternoon at most. We can theorize that maybe she did not adjust the time to Greece and her wristwatch is still on Connecticut time, making it 2 pm in Greece, but it still wouldn't be right, since Daniel Craig was checking the time at the beginning of the dock scene and it was 10 am, and the ship sailed for 2 hours. (00:13:20 - 00:23:40)
Continuity mistake: The first time that Joseph Gordon-Levitt's "Dong" echoes in the estate, Kate Hudson's position changes entirely at the reaction shot. (00:23:15)
Other mistake: When Benoit and Andi have their little chat on the beach by the pile of bags, they do it under a stealthy pretense. However, nobody can overhear them, and they have a good reason to exchange a couple of words, while they show later in the movie no fear of being eavesdropped on even in their room and in places like the bathroom or the gym who could very well be bugged or have cameras, as opposed to an open and deserted beach. In a flashback we even see them hanging out at the hotel together, exchanging information that reasonably they needed to sort out back in the States. (00:22:35 - 01:12:45)
