Audio problem: When Luke says, "Now all we gotta do is find this Yoda, if he even exists," if you look closely, his mouth never moves.
Audio problem: The aliens that populate the planet of Geonosis have an extremely peculiar method of speech - consisting of clicks and weird ringing sounds. However, despite the fact that they make up 99.9% of the crowd in the arena, the sound of the crowd cheering is human. (01:44:10)
Audio problem: When Vader is talking to an Imperial officer in the hangar in the Death Star, when the officer says, "It must be a decoy, sir. Several of the escape pods have been jettisoned." his head is shown from behind, but his profile shows his mouth is moving before the words are heard. (01:03:55)
Audio problem: When they are fighting on the smaller skiffs above the Great Pit of Carkoon, Luke beckons to Leia to get her to swing on that rope with him to safety. He says "come on", but his mouth never moves.
Audio problem: Before the Trade Federation Droid Control Ship starts exploding from the inside, a Neimoidian says, "Nothing can get through our shield". But his mouth doesn't move until after he's said it. (01:57:45)
Audio problem: After the buzz droids land on Obi-Wan's starfighter, Obi-Wan says, "I'm hit. Anakin?" As he says, "Anakin?" his head is turned to the side, but you can see that the last word doesn't quite fit his lips or the motion of his jaw. (00:05:10)
Audio problem: Right before Kylo Ren kills Lor San Tekka, he says "You're so right," and the sound of him igniting his lightsaber while raising it upward, then killing Tekka. You can see red light that is flickering at the bottom of the screen while Ren is talking, meaning that the lightsaber is on, but there is no sound of the lightsaber, and there is still a sound of ignition when it is already on.