This happens on 60fps, and I figured it was a bug like the last time a game update came out that required a hotfix. I killed the app, went back in, changed it to 30fps, and same thing happened.
Latest iPad Pro with latest iPadOS firmware.
https://www.youtube.com/watch?v=rMLr6Me9A_oFWIW, it does NOT happen on my iPhone 14 Pro Max (also latest iOS firmware) @ 60fps (the last time this happened was with the 60fps game update and the flickering took place on my iPhone and iPad).