iPhone 12 Pro Max camera issues

Has anyone got issues with your iPhone 12 Pro Max camera ? See below that I have on mine:

1) when making video on main 1x sensor and only at 4k 60fps, the screen is suffering from significant flickering. This is not happening on any other resolutions and frame rates. I have compared to my old Xs and Xr with same settings, same scenarios and this issue is not present at all. I have also tried changing shutter speed manually to 1/120 on Filmic Pro, as normally this would resolve the issue, however no matter how I set settings manually flickering is present at all settings, when recording 4k 60fps. I have tried resetting the phone, force restarting, with no luck. I am on 14.2. I even tried using every possible settings scenario on both display and camera settings and still not possible to eliminate the issue :(

2) Ultra wide lens 0.5x is suffering from lags, stuttering when on 4k 60fps. When you touch screen to get auto exposure square and focus point, lag and stuttering is heavily present. The moment exposure and focus point disappears all is back to normal. Again this is only happening when on 4k 60fps and in all lightning conditions. I have tried all above and absolutely all settings but no luck with getting this resolved.

it would be good to see if anyone has come across these issues and managed to fix anyhow. Any help would be greatly appreciated. Happy to share my OneDrive link, so you can see the videos with these issues.

Thanks guys.

Kris