Continuity mistake: When Steven arrives on the Sun Incinerator, he's carrying a large sub (sandwich), which he gives to Lars. After the ship's power goes out shortly thereafter, the sub has vanished.
Continuity mistake: When Amethyst takes a picture of herself to set as the wallpaper for Pearl's phone, she's holding the phone in her right hand, with her left hand on the back of her head. Later in the episode when Steven retrieves the phone and the picture is seen, Amethyst is holding the phone with her left hand, with her right hand on the back of her head.
Continuity mistake: When White Diamond, while controlling Blue Diamond, is talking about how the latter's impurities absorb all of the warmth in her spectrum, Blue's gemstone is depicted as triangular instead of its actual appearance as a diamond-shaped point cut.
Continuity mistake: When Sadie is sitting on the bumper of Greg's van telling him about how her mother used to pry into her life, the diamond-shaped window on the left side of the van is missing.