Continuity mistake: When Pierce's wife is walking in her auto shop they pan down to show her red Louboutin heels, then they cut to her walking in her office, and when they show her shoes again they have a tan sole.
Continuity mistake: When driving the silver Audi A6 the first time, the version they are driving is a diesel, seen by the exhaust pipes facing down towards the ground with a bend. In the next shot they are driving the petrol version of the same A6, seen by the exhaust pipes holes facing directly out from the car. (01:18:33)
Visible crew/equipment: When the Protagonist passes through Sator's turnstile to return to the ambush site on the highway and gets in the inverted car, a cameraman holding the camera is reflected on the wing mirror. (01:31:38)
Character mistake: Whenever a YouTube livestream by jacksepticeye is shown, his name in the URL is misspelled as "jackspecticeye," and his username is spelled with a capital J when it should be a lowercase j. (00:30:16)
Continuity mistake: Once Mulan has reached the top of the mountain with her buckets, the action moves to the Rouran troops assaulting a city. Gong Li's witch is womanhandling a bunch of soldiers who try to impale her. She grabs a spear a few inches away from its feathers, but in the next shots her hand is covered by them. (00:50:50)
Continuity mistake: Trevor is driving the Ecto-1 and complains that Podcast is breathing on him. We see Podcast very close to him. The shot cuts and Podcast is now further away.