Continuity mistake: When Finn is going to an escape pod to run away, he puts his pack down in front of it, seen again in a later shot. When Rose realises he's trying to run away, his pack has moved itself inside the pod.
Continuity mistake: During the throne room fight against the red-armoured guards, one of them splits his weapon into 2 blades. In the shot where he gets Rey into an arm lock, the blade in the guard's left hand vanishes from the scene completely, in the middle of a shot. The hand that held the weapon is obscured by Rey's body at the point when the disappearance happens. It could be that the actor dropped it (a strange thing for an elite fighter to do), but then the blade is nowhere to be seen on the floor in the wider shot when Rey kills him.
Continuity mistake: When Rey is following Luke up the hill in the infamous milk scene, her holster switches from being on her right side, to her left, and then back again.
Continuity mistake: As Poe Dameron starts his attack run against the Dreadnought we initially see him from the side and his helmet microphone is folded out to the left away from his face. The camera cuts to directly in front of Poe and the microphone is now folded in and directly in front of his mouth. (00:03:25)
Continuity mistake: When Rey goes into the dark place that she was drawn to, she reaches out to the cracked glass wall with her right hand. In the next shot she is touching it with her left. (01:14:23)
Suggested correction: It was because she was inside the glass.
Then it would have been reversed.
Continuity mistake: When Poe realises that Holdo is fuelling up the transports, he is suddenly much closer to her than he was in the rest of the scene.
Continuity mistake: On Finn's and Rose's mission to find the master code breaker, when Finn walks up to the game table, the people around him are completely changed in the following shot. (00:52:40)
Continuity mistake: Towards the end, Leia is talking to Rey in the hanger. In a shot facing Leia she looks down, then we cut to Rey and Leia, seen in profile, is instantly looking up, straight ahead.
Continuity mistake: Rey steps forwards to hand over Luke's lightsaber, then takes a couple of steps back. The shot cuts and they're suddenly much further apart.
Continuity mistake: While Rey is practicing with the pole, it changes position on the floor.
Continuity mistake: When Rey is practising with the lightsaber on Ahch-To, she swings it very close to a towering rock. The camera then cuts to a wide shot showing her with the lightsaber, now feet away from the rock she was only inches away from in the prior shot.
Continuity mistake: When Leia and Rey feel Luke's force fading, Rey has a dark, burned, non-bleeding wound on her right arm. After Kylo enters the abandoned mine, he sees Rey through the force. The wound from before is now bright red as if it were still fresh and bleeding.
Continuity mistake: When Rey is following Luke upwards the steep terrain, between the two shots in which Luke is visible, there is a shot of Rey kneeling down, following up with her noticing the old Jedi tree. Given the amount of time the camera was focused on Rey, Luke should have been significantly further away as of the second shot in which he is visible. Instead he is seen continuing walking, starting from a point that he had already passed in the previous shot. (There is one dark spot on the ground, in which Luke can be seen walking past to his right in the first shot, which can be used to help identifying the mistake). (00:21:40)
Continuity mistake: The position of Rey's right arm changes between the two first shots after we get to see BB-8 thrown to the ground in Canto Bight. (00:55:15)
Continuity mistake: After the scene showing the First Order ships appearing behind the Resistance ships, when Poe Dameron says "It's Snoke's ship. You gotta be kidding me!", the immediate next shot shows him further away and facing a total different direction from Admiral Ackbar. (00:26:30)
Continuity mistake: When the light saber breaks in half, Ben is thrown to the left of the throne while Rey is thrown to the right. Once Ben wakes up, he is on the right of the throne, exactly where Rey was when she refused him. (01:51:50 - 01:55:10)
Continuity mistake: When Rey meets Luke for the first time, the sun changes between shots.
Continuity mistake: While Rey is practising with the pole and the lightsaber, the sun changes between shots.
