Continuity mistake: When the Death Star fires on Scarif, Jyn and Cassian settle down on the beach and Jyn is shown with her back straight whilst she is kneeling, but in the next shot, she is suddenly leaning more forwards. (02:02:25)
Other mistake: When Rogue One's team runs onto the beach after the AT-ACT follows them at the beginning of the scene it shows Stormtroopers walking next to them on the beach, but that's impossible due to the fact that all the AT-ACTs (excluding one who is moving in the water at the background) are still moving through the trees. (01:40:25)
Continuity mistake: When Director Krennic and Governor Tarkin are discussing testing the Death Star, Krennic says he will not fail and turns around to leave. As he turns, an Imperial officer is seen standing a couple of meters away from him in the background, but in the next shot, the Imperial officer is suddenly right behind him. (00:23:20)
Suggested correction: That is not correct, Captain Dunstig Pterro is not that far, and Krennic moves pass him and then Pterro follows.