Continuity mistake: Look at the forehead of the hotel manager. Everytime he raises his eyebrows, you can see his prosthetic forehead piece.
Continuity mistake: When the kid finds the hall where the meeting will take place, he grabs the middle part of the door handle. In the close-up he is grabbing the lower part.
Continuity mistake: When Grandma serves Boy the chicken wings, she walks down holding the laundry basket. Her left arm's position is either on the right side of the basket or all over the basket, depending on the shot.
Continuity mistake: When the boy is about to eat his corn bread, the knife on the left keeps changing positions between shots.
Continuity mistake: Grandma opens the curtains to show the boy his new room. When the shot changes the right curtain is semi-closed.
Continuity mistake: When the Grand Witch throws the lectern, it lands 6 meters away from the chairs. When the shot changes, it's barely 2 meters away (note the wooden planks on the floor).
Continuity mistake: While at his new bedroom, the suitcase next to the boy has its handle raised or lowered, depending on the shot.
Continuity mistake: Grandma picks up the boy at the police station and comforts him placing her left hand on his shoulder. From the opposite angle her hand is on his back.
Continuity mistake: When the boy arrives at his new room, the picture frame and the stuff on the night table move around between shots.
Continuity mistake: When the second kid is turned into a mouse, the way his jeans lie on the floor changes positions between shots: first both legs are equal in length, but a shot later the left one is longer. Also, the sneakers change positions.
Continuity mistake: When the first witch turns into a mouse, the way her empty dress lies on the table changes between the first and second shot, in a mere frame. Check the plate on the left, for example: it swaps from uncovered to covered by the dress. Also, the first shot shows more lace by the edge of the table, while the second shot shows much more silky fabric.
Continuity mistake: When the Grand High Witch kills a witch, there's a broken lectern on the floor. When the dead witch bolts backwards, the broken lectern disappears.
Continuity mistake: When Grandma serves biscuit and orange juice to the kid, the yellow napkin on the table keeps changing positions between shots: from perpendicular to the table to skewed.
Continuity mistake: When Grandma shows her bag with the mice inside to Bruno's mom, her grip on the bag changes between shots: sometimes she is grabbing the upper handle where the yellow threads are; others, the wooden part slightly below the threads; and yet in other shots she is grabbing the lower wooden part. This changes back and forth. Her right thumb also appears and disappears randomly.
Answer: They do. I just loaded the movie up on HBO Max, and it's literally the first credit to pop up in the end credits.
TedStixon