I’m having the same issue, I don’t play games or what not but when I record 4K at 60FPS with the wide lens configuration, the iPhone lags ridiculously slow like 2 second delay every time it focuses on the target. Playing back the recorded “4K 60FPS” video does not seem butter smooth motion and is jittery. I just bought the iPhone 12 Pro few days ago from T-Mobile, first thing I did was a restore and update to iOS 14.4. What’s the problem with this? Think I got a faulty iPhone?