Finn and Rose crash right in front of the battering ram cannon, which is shown to be heavily guarded. The enemy forces are under a "no prisoners" order. How were the heroes able to traverse the great distance back the mine's entrance without being attacked? Because Kylo Ren issued an order to have all guns fire on Luke Skywalker, therefore the enemy's attention was divided. Furthermore, it is shown that there is a trench they could take refuge in, which other soldiers are shown using.
Finn and Rose crash directly in front of the First Order troops and well before Luke shows up. Also the trench that they could have, but didn't, gone to was much closer to the Resistance base than it was to the First Order troops. They would have still had to cross a large amount of open ground before reaching safety.
When Finn is trying to board the escape pod, he places his bag outside of the pod. When Rose stuns him into the pod, his bag is inside.
On the planet Crait, Rose collides with Finn to stop him from committing suicide. Rose passes out. in a few minutes Lei and the crew are looking for an escape route while Luke fights. As they escape, Finn shows up dragging Rose. 2 problems - 1 it is pretty far to drag Rose to get back there that quick, he would have to be dragging her right past Luke fighting, Kylo's ship, and right in front of all the AT-ATs to get the best time. 2- there is a long trench where soldiers shot from. Either he went around or would have to lower her then lift her up almost over his head to get past that obstacle.
The rebels cannot jump to light speed because the First Order can track them, but the the First Order cannot catch up to them, they can only keep pace. But, it would be a simple matter for the First Order to have a couple ships go to light speed a short distance and immediately return just ahead of the rebels. The First Order could easily and quickly destroy the Rebels with this simple tactic. The resistance would have been trapped in a flanking attack and overpowered by the First Order.
In the opening sequence the bombers are going to throw bombs on an enemy ship. Since they are in space this won't work. Bombs don't fall down in space. They would need some kind of fire device to fire them down. Every ship, on both sides, has a device for creating artificial gravity ; which would push the bombs "down" through the bomber, and pull them "down" onto the target. In addition, it's possible the bombs have some kind of magnetic properties that would attract them to their target.
Just before a Praetorian Guard puts Rey into a headlock, the guard is holding a vibro-arbir blade in each hand. In the same shot, only a few seconds later, the blade in the guard's left hand has vanished behind Rey's back, and is never seen again.
At the beginning of the film during the bombing sequence, a character is seen inside her ship with the doors open to allow the bombs to be dropped out of the ship. She does not have any kind of oxygen mask or supply, despite this sequence being set in space. However, all through the Star Wars films, there are openings into space that do not affect a ship's atmosphere. We see this in a New Hope in the Death Star hangar bays and in The Force Awakens when Poe and Finn steal the TIE Fighter. A thin magnetic shield is used to allow solid matter, but not gasses, to pass through it.
When Poe gets permission to leave the bridge and runs towards the X-Wing bay, several pilots on the bridge follow him, including the alien C'ai Threnalli. However, immediately after we see C'ai run out of frame, there is a reaction shot of Finn with C'ai still standing at a console in the background.
On the way toward the opening bombing run, Poe's helmet mic is extended straight out. In mid-sentence, the camera cuts to the opposite side of his face and the the mic has been re-positioned 90-degrees now properly located under his chin.
If the topsoil of the planet Crait is disturbed, the white sand reveals the red, salty material. When Finn and Rose arrive to the planet, they drag on the ground in the First Order Transport Shuttle before entering through the gate. In a later shot of the gate, the ground appears white and undisturbed.
Close-ups of Leia's hands show longer, manicured nails, immediately followed by unmanicured, ragged, much shorter nails. (When Poe reaches out to her, and when Luke gives her the dice, among other instances.)
In the first shot of the scene where Luke talks to R2D2 on the Millennium Falcon, R2D2's head turns towards Luke. In the next reverse shot it is still facing away, then turns around again in the next shot.
The second time Snoke and Kylo Ren meet in the red room, you can see two black-clothed technicians in the background. Although the door is always in the shot and they are not seen leaving, they suddenly disappear.
Without friction in space an object would maintain speed. The last assisting ship clearly slows down before it gets shot by the Order.
In the last scene of light saber battle, after firing like crazy at Luke, the white ground covering is disturbed, and the ground is burned from the heat from the energy blasts. During the duel, the ground is back to white sand again.
During the slow-mo chase, the rebels lost 2 or 3 support ships that ran out of fuel. It is established that the fuel for sub-light engines vs light-speed engines is separate. So why didn't they send all the support ships at the star destroyers at light speed to destroy them. The last person on board was going to die anyhow. Or why didn't the last capital ship head to the same planet to cover the shuttle retreat, there by lending cover to the shuttles? Clarification: The crews of the Ninka and the medical support ship are shown being evacuated to the Raddus before they run out of fuel, leaving them empty by the time they are destroyed. Other Star Wars media has established that jumping to hyperspace through a solid object is incredibly dangerous to any object in the vicinity, including friendly ships, due to hyper-accelerated shrapnel and the complex physics of hyperspace. Because Holdo had a plan to stealthily land on the planet Crait, which she had presumably communicated to other officers, there was at the time no need to try such a potentially disastrous maneuver, Holdo only took such a risk when the threat of total annihilation was imminent. The evacuation shuttles were already far away from the Raddus when the First Order opened fire on them, making it impossible for the Raddus - a larger, less maneuverable ship with virtually no fuel left - to have reached the shuttles before they were wiped out.
In all previous movies "Jedi ghosts" could only be seen by and interact with other Jedi, but in this movie "ghost Yoda" was able to summon lightning to destroy the Jedi tree. This ability would not fundamentally alter the course of the Star Wars Universe in the slightest, since the Jedi ghosts generally follow a path of minimal intervention.
When Rey wants to hear the real truth from Luke of what has happened to Kylo and him you can see the rain pouring down. But when Rey leaves Luke's planet one shot later, it is not raining anymore and Luke and his clothes have become dry in just a few seconds. However, we know that more than a few seconds has passed because we know it takes a while to climb down to the Falcon and we also know that Rey took the Ancient Jedi texts with her.
Despite Rian Johnson's excuse that Luke uses Anakin's lightsaber to taunt Kylo Ren, Luke has no way of knowing about Ren's interest in the saber, it having been lost over thirty years. Ren only ever shows interest in it to Finn, Rey having been knocked unconscious. Finn never interacts with Luke and could not have told Rey about Ren's interest in the saber.
On the Island when Rey falls into the dark hole, she is underwater, but right afterward as she is walking and duplicated, her hair is wet but her clothing is dry.
Princess Leia is so powerful with the force that she can fly through space like Superman, yet when the rebels are trapped they must rely on Rey's ability to remove the rocks even though Leia is with them. Clarification: While The Empire Strikes Back established that the weight of the object being moved is irrelevant to use of the Force, it has also established that the perceived weight of objects creates a psychological barrier to anyone untrained in use of the Force. The number of objects and the ability to see an object does have an impact on the ease with which the Force can be used to move things. Moving one object one direction in a weightless, frictionless environment is a relatively rudimentary use of the Force, while simultaneously controlling the movement of several dozen multi-ton objects, some of which aren't visible to the force-user in question is drastically more difficult. Also, one instance instinctive use of the Force under extreme physical duress is not the same as continuous, willful use of the Force.
When the animals at the race track are let free and running through the club house, there is a closeup of the vibrations in a glass of tea on the table in the hall way. As the camera pulls back, no table in the dining room is disturbed- shakers, vase, etc.
In one of the first scenes Finn is talking to Admiral Ackbar and they're facing the window, while in the next cut Admiral Ackbar is facing another side.
It is stated that Snoke turned Kylo Ren to the dark side while he learned at Luke's Jedi academy (probably through the Force visions Snoke later uses to lure Rey to his ship). Snoke was clearly a threat back then, being a dark side Force user, yet there is no mention about any attempt to stop him previously. Clarification: It is established in Star Wars canon that powerful Dark Side users can use the Force to obscure their presence and their actions from other Force-users.
At some point, Rey cries and tears are running down her face. The line of her left tear disappears and reappears between the shots.
When R2D2 and Luke are talking, R2 plays the recording of Lei from episode 4. R2 turns his "head"(which has the projector) but the picture does not move.
When Kylo Ren fights Luke Skywalker, his hold on the lightsaber switches from backhand to normal and backhand again between cuts.
When the fathiers stampede out the stable, a guard rushes into the corner of the room near a pipe. In the next shot the guard is no longer there.
When Kylo Ren kills the last red guard, the right hand of the guard opens. In the next shot, his right hand is a closed fist again.
In the last battle, the "ski?!?" battle speeder fleet view from the back show their shadow front to the right but everything else- AT-AT's, cannon towers, etc show a shadow which should be back right to the speeders.
When Hux examines the aftermath of the Red Room, he turns his head to look at Kylo Ren unconscious on the floor behind him. In the next shot Hux is facing Ren.
When Rey arrived at Snoke's ship, Adam Driver's Ben Solo noticeably has a visible mustache and a small beard on his chin. It was not in the previous scene (shirtless scene) or the next scene in the throne room.
During the conversation between Kylo and Rey, the distance between the two faces varies in distance apart.
When Fin and Rose are caught and standing in the hanger, they show a bunch of storm troopers marching. The marching sound does not match the step of the soldiers walking.
The dice toy was projected to Crait by Luke, the original is shown to be on the Falcon. Yet it stays on Crait minutes after Luke died.