https://arstechnica.com/gadgets/2021/09/2021-ipad-mini-suffers-from-uneven-jelly-scrolling-in-portrait-mode/

Apple's newest iPad mini was released to the general public on Friday, and over the weekend, users began to complain about a subtle scrolling problem when using the tablet in portrait mode (MacRumors has a good round-up post). The tablet appears to refresh the left and right halves of its screen at slightly different rates, creating a subtle-but-noticeable "jelly scroll" effect. The Verge's Dieter Bohn has captured slow-motion video that demonstrates the problem.