iPhone 16 Pro Max screen issue.

I know there was some screen issues on iOS 18 (iPhone 16 Pro Max) but I've noticed a problem that I've had a couple times and I want to make sure it's a OS and not a device issue. Rarely there is a bug where the refresh rate of the screen seems to drop to 60 Hz and the screen starts to react badly to touches, but if you lock and unlock the phone the problem disappears, please if anyone has encountered this tell me if this is an iOS bug or if there is something wrong with my phone.