When Ludmilla is human, she has five fingers but when she turns into a dragon she only has four.
The key on Ludmilla's arm disappears.
One of Baba Yaga's jars misspells "desiccated" as "dessicated".
During Lumella's dragon transformation scene, most of her clothes disappeared. They should have been shown ripped and placed on the ground. After her dragon skin changed from burnt orange to purplish pink, when she did another transformation phase where her torso became fat and more dragon-like, her sleeves are gone rather than ripped when her arms changed into fat dragon arms. Some of the intact parts of her outfit are stretched, and her shoes are enlarged when her dragon feet were enlarged. When she grew larger, the parts of outfit are still intact. In the next phase, her shoes grew larger, and her outfit got more stretched. The enlarging and stretching should not happen because clothes cannot logically fit her dragon body. Also in this phase, her skirt completely disappeared, and the band on her ponytail disappeared when her hair was replaced by horns. After she flung her shoes out of her feet, in another scene, the remainder of the outfit is gone. The only clothes that were never damaged were her shoes and the ribbons on her sleeves, which went off-screen during Lumella's transformation.
Lumella wears normal high heels, which cover both sides of her feet. In some scenes, the shoes lost the side-covering parts, making the shoes look like Dorsays. These happened before her feet became burnt orange dragon feet.