Continuity mistake: When the Protagonist and Neil first see the inverted vehicle driving backwards towards them, there is a bridge (with an Alexela sign) shown in front of them and just ahead of the bridge is a gas station shown to the right of shot. It then cuts back to the Protagonist and Neil, where Neil asks "The hell is that?" and when it cuts back to outside the windscreen again, the bridge (with the Alexela sign) and the gas station are no longer visible, presumably having driven past them. It then cuts to a shot focusing on the Protagonist, and when the shot cuts back to the inverted vehicle bumping into the wing mirror, they are suddenly behind the bridge and gas station again and are yet to drive past it. (01:18:30)
Continuity mistake: Just after the Protagonist has obtained the case containing the Plutonium-241 and is back in the car with Neil, he opens the case and his right hand is shown placed on top of it. It then cuts to a different angle and his right hand is suddenly touching the Plutonium-241. (01:18:09)
Continuity mistake: In the yacht when Kat hides from Andrei in the protagonist's room her right arm is over her chest or not, depending on the shot. (00:59:58)
Continuity mistake: When Andrei is about to beat Kat with a belt, he throws cushions at her. One lands right next to her head, but disappears a shot later. (01:03:45)
Continuity mistake: The emergency slides on the 747 that the team use to kick out the pilots disappear after they are deployed. Certainly they would be visible when the plane crashes into the building. (00:41:15)
Continuity mistake: When Barbara asks the Protagonist which bullet is which, when Barbara "picks up" the backwards gun, the bullet is fallen over on the table, indicating it's been dropped. (00:14:31)
Continuity mistake: When Sator confronts Kat in her bedroom, he begins to unbuckle his belt. He is first shown with both hands beginning to unbuckle the belt near the front of his trousers, but when the shot cuts, his right hand is suddenly shown pulling the belt out of the belt loops on the right hand side of the trousers. (01:03:25)
Continuity mistake: When the Protagonist walks into Sator's office, a doctor is shown checking his blood pressure and is then ordered to leave. In one shot, the doctor is shown walking past the Protagonist, but in the next shot, the doctor is shown walking past the Protagonist a second time. (01:00:40)
Continuity mistake: When the bodyguards have the Protagonist cornered in the kitchen, they place his hand on a chopping board. In one shot, just as one of the bodyguards raises a utensil he is holding to hit his hand with, the Protagonist is shown raising his fingers slightly, right before the shot cuts. It then cuts to a different angle where his hand is now flat on the chopping board. (00:32:40)
Continuity mistake: Just after the Protagonist has had some of his teeth pulled out by the Russian driver, the driver begins turning the time on a clock back by one hour. He is shown holding the clock with his right hand, and is shown turning the time back with his left hand. But in the next shot, he is suddenly holding the clock in his left hand and his right hand is at his side. (00:08:10)
Continuity mistake: When the Protagonist is being questioned on the train tracks by the Russians, the driver removes a cyanide capsule that the Protagonist had hidden in his uniform. In one angle, he is shown holding the capsule with two fingers and one thumb around the bottom half of it. When the shot cuts to a different angle, he suddenly has one finger positioned on top of the capsule. (00:07:23)
Continuity mistake: When the Protagonist, with Neil's help, is trying to stop the inverted car in which Kat is locked up, the door's window is lowered differently depending on the shots. (01:20:36)
Suggested correction: People doing procedures change gloves all the time. There is nothing suspicious about using 2 pairs of gloves in 3 minutes.
He was already done with the procedure when he removed the first pair of gloves. He was never shown putting on the second pair.
It's the same scene replayed, a true editing error.
But this scenes are within about 15 seconds of time - so there is no time to put on another pair.