Continuity mistake: During the "We Don't Talk About Bruno" sequence. Towards the end when they are wrapping up the song and the family was circling around Mirabel. The animators accidentally added the "gold fish" woman instead of Dolores. When she leaves the scene for a split second they add her to the sequence. (00:49:16)
Suggested correction: Hyrum Osmond, who edited this scene, explained they did not want the complexity of all the characters, but wanted fish lady in as well. How this was done is shown on his youtube page: https://www.youtube.com/watch?v=el4d-r3ZYg8.