[GIF via AnimeAjay]
You might have noticed. You might not have. But as Twitter user AnimeAjay points out, episode 97 recycled some animation from an earlier Dragon Ball Super episodes, such as number 85.
Here's the reused animation from last night's episode and its NEP. pic.twitter.com/SKLgtUaEr1
— Ajay (@AnimeAjay) July 2, 2017
As you can see, backgrounds and colours have been tweaked.
Saiyan Island points out that this isn't necessarily a bad thing! It saves the studio money. Some fans even think it's better to recycle good old animation than churn out bad new animation.
Though, there are those who wonder why Toei isn't producing good new animation. Maybe that's for future episodes.