Continuity mistake: On the pier, Kate Hudson calls Blanc "Stranger danger." The Greek porter Nikos makes a comment about it, hands on a suitcase, and Lionel is carrying a bag next to him. Brief reaction shot to a masked Daniel Craig that denies that, and not only Nikos' hands switched position and are on a different suitcase (which could have happened even if it's not what the posture implies), but Lionel is also bringing again the same bag. (00:14:25)
Continuity mistake: Benoit Blanc tells his partner to get the door and unconvincingly says he is not in the bath, his left-hand changes blatantly position between shots. Throughout the whole scene in fact you can see Daniel Craig's hand by the second laptop in the side views but not on the close-up of the remote call. (00:12:25)
Continuity mistake: When the Disruptors flick the final switch, Lionel's finger in the split screen shot comes from the right side of the frame, where the "7" is. In the shot of his desk though he is positioned on the opposite side of the box. (00:09:10)
Continuity mistake: The friends crack the final puzzle of the box and it open. Look at Lionel's desk when that happens; the shadows and the distance between the box itself and the crazy fax papers ("Nootrodic Nasal Spray"?) change between shots. (00:09:15)
Continuity mistake: When Claire calls Lionel at 14:07 asking him about the puzzle box, the phone in close-up is in a spot far away from any edge, while in the wider angle it's practically on the edge. (00:04:00)
Continuity mistake: An odd creepy guy ("Vampire in a tuxedo" according to the credits) gives Birdie an approving nod when she protests against the "woke" people that don't let her racial slur slide. She says "Love you, yes!" pointing at him, with the elbow of the other arm fully lying on the lap of the girl on the couch. Next shot and her pose changed entirely, no physical contact with other guests. (00:03:50)
Continuity mistake: The very first shot with Kate Hudson ends with her shouting for her assistant Peg. Look at the position of her fingers on the glass, very close to the rim. She is still shouting in the reverse angle but her grip on the glass changed. (00:03:05)
Continuity mistake: Miles tries to rally the troops after Helen delivered the line about him being ruined. He calls out "Gang?" Lionel is staring into space facing away from him, then in close-up he is still staring into space, but turned more towards him. (02:09:40)
Continuity mistake: The bloodstains on Helen's top change midway through the ending. For instance, when she walks towards Miles after smashing most of the glass sculptures to eventually show him her trump card, she has a visible red spot on her right breast (which you could see earlier even when she was wearing her blazer), gone when she gets up from the floor after the explosion. (02:05:00)
Continuity mistake: In the close-up of Helen igniting the alcohol on the floor, she moves the arm away from the floor and all the way out of frame, appearing also to get up from her kneeling position. A few seconds later in the wider view of the room she is still with her hand down. (02:04:15)
Continuity mistake: When Helen is bashing the bar, the gestures of the other characters in the background are inconsistent from shot to shot (just look at Kate Hudson and Kathryn Hahn's reaction shots, for instance). Same when a few seconds later she throws pillows in the fire. (02:04:00)
Continuity mistake: Helen pleads someone to say "I saw the napkin before he burned it." In the background, Miles is standing, hands down his sides. The camera cuts awa a split second on Claire and Lionel, and then there's a close-up of Edward Norton leaning with the back, and the palms of his hands, against the table. Same few moments later. (02:00:10)
Continuity mistake: When Helen reveals herself holding the envelope on the stairs, she holds it with one, then two hands in the two separate shots. (01:52:00)
Continuity mistake: In the flashback, "Andi" is dead with her right arm on the last step in most shots (as she was the first time we saw the scene) or the one below (like when Blanc is crouching and curses saying "Sh*tballs." (01:45:20)
Continuity mistake: In the argument between Birdie and Peg that Helen happened to record, Kate Hudson's hands are in a different position in her lap in the reverse shots when she says "There's no stopping it" and just after she admits "It's my secret phone." (01:37:25)
Continuity mistake: In their bathroom consultation, Blanc compliments Helen about the 'interesting stuff about Whiskey'; he is leaning on the sink, and then suddenly he's gesticulating with that same hand. (00:01:29)
Continuity mistake: Whiskey is walking with Helen towards the pool. When they are under a colonnade, the Taurus pendant shifted towards her left pectoral much more than it was in the previous shot. (01:26:50)