Continuity mistake: When Kat wakes up for the second go-around of Valentine's Day (the first repetition), she scoffs at the text from Bradley, her date who bailed on her. When the text is inserted onscreen, it matches the original day's, mentioning their planned dinner and first in-person meeting. When her phone's actual screen is shown, the text from Bradley is an invitation to breakfast. They never had or planned a breakfast. The wording is very similar to Danny's invitation at the end of the movie.
Other mistake: The private investigator has a full size Glock. The Glock 21 which is a .45 ACP has the lowest magazine capacity of 13 rounds. The 9mm capacity for the Glock 17 is 17 rounds. The PI exchanges gun fire and after he fires 7 rounds, his gun runs dry. Makes no sense to bring a half empty gun to a fight, plus he just got it back from his brother-in-law. (01:05:00 - 01:06:00)
Continuity mistake: Man-seob smears some cream above his upper lip after a few smoke grenades are deployed. The amount of cream shown over his upper lip changes between shots.
Visible crew/equipment: When the police woman falls off the boat when the shark hits it, on the right side of the screen, you can see a hand outstretched, as if reaching out to grab her. It doesn't belong to the only other person on the boat, since he's behind the wheel and completely out of reach. So, it belonged to a person who wasn't supposed to be there.
Continuity mistake: The candle to the far right in the candelabra is tilted to the right to various degrees or not in between shots. (The other candles aren't exactly straight up.) In one shot, the candles are further apart (not paced the same distance between them). The top half of the candelabra was tilted to the right when the right candle was leaning against the wall. (00:24:27 - 00:25:20)
Continuity mistake: In the treehouse, the contraption Henry built releases icing in a pile onto the top of the cupcake (or brownie) Peter is holding. When Peter moves the cupcake to his mouth, the icing is evenly spread in the middle. (00:07:04)
Factual error: The film informs us the gravity on Neptune's moon Triton is less than 8% of Earth's. But the whole physics of the rocks and his movement on the surface do not reflect that. The actual surface is frozen nitrogen. The difficulty he has in moving around is not well correlated by him only weighing 7kg. Https://www.imdb.com/title/tt5361488/.
Continuity mistake: When Saul and "Nookmis" (his grandmother Naomi) leave on the canoe, there are several blankets/rolls of food between them. The pile reaches to about Saul's waist in the canoe. When Saul and Naomi continue their canoe trip the following morning, the pile of blankets/rolls between them is higher (almost to Saul's shoulders) and the colors/sizes look different (larger, even though they obviously ate some food). (00:11:37 - 00:12:09)
Factual error: Will's Range Rover has a rear New York license plate but not the required front plate. (00:08:25)
Deliberate mistake: The front passenger's side mirror [driver's side is on the right] is parallel to the screen/camera yet there is a perfectly clear image of the passenger's face looking into the mirror. (00:00:38)
Continuity mistake: Charlie was standing in the hole he dug and his head was below ground-level, but when Eliza was talking to him, Charlie's head was above-ground. Half of Charlie's back was above-ground when his mother [Toni Collette] was outside. Front views of Charlie standing in the hole still showed him against dirt (head below surface-level) even after he was just shown with his head above-ground. (00:51:10 - 00:51:46)
Continuity mistake: There's a vase of yellow flowers to the right of the helium "Happy Birthday" balloon (and screen). When Ashley gets up to answer the door, she walks past the balloon and the vase of flowers should be visible but is not. (00:01:40 - 00:02:28)
Factual error: The musicians in the (real) Band of the Coldstream Guards that plays Happy Birthday for Christopher Robin are wearing their 21st-century uniforms and medals.
Continuity mistake: Addison put his sweater on (over his neck and arms into the sleeves). After his dad asked him if he was OK, the view of Addison in the mirror showed him putting his sweater on again. (00:16:04)
Continuity mistake: After Danielle stabbed Junior, his papers were by his feet. When Junior's mom found him, the papers were by his hands. The knife was also closer to his feet compared to when Danielle dropped it onto the floor. (00:03:39 - 00:04:30)
Factual error: A group of people are traveling in a pickup truck escaping earthquakes and volcanic eruptions. They come across a mist that they identify as sulphur dioxide, mainly by its smell and effects on people. Then the plastic interior of the car starts to melt, and they attribute it to the sulphur dioxide. Sulphur dioxide can attack plastics and rubber, but only in its liquid form. It turns gaseous at -10° C. After that it is a gas. So the melting of plastic is not correct at ambient temperature.
Factual error: Following the blowout, Sara's phone is shown several times as being connected to Wi-Fi with a full Wi-Fi signal. Being in the middle of nowhere, surrounded by hills, it's highly unlikely there would be a public Wi-Fi connection for her to connect to.
Continuity mistake: The glass bowl of spaghetti is filled within about 2" from the top, but the mound in the center almost reaches the rim when Janice carries it to the table. After Tim serves at least 1 cup servings onto 4 plates, the bowl looks just as full as it is when Edwin leaves the table. (00:14:27 - 00:16:17)
Continuity mistake: After the car almost hits Lenna and Dalton, they walk beyond the right corner of the car's bumper, but are still in front of the bumper when the camera shifts. (00:01:55)
Continuity mistake: In the mid-credits scene in Justice League vs. Teen Titans, Terra's hair was shoulder length and she had no freckles, but in this movie, she now has shorter hair and freckles.