Unable to verify camera

Saturday 8. of May I updated to iOs 14.5.1 and the iPhone has been unsteady since . Every now and then it comes error-messages that it cannot verify the camera (but the notification in settings is continuous). I have an iPhone 12 pro that is under 30 days old. There has been nothing wrong to the phone before this.

I contacted Apple support and describes my problem; 0,5 works in slow-mo, but not in picture-mode, 2x zoom works in video-mode, but not in timelapse and so on... I even think the whole phone just started acting bad.

In cooperation with Apple support we tried to restore into factory settings, tried an earlier backup etc, but nothing worked. Now, the iPhone works at least, but it behaves different, and especially the camera modes are defect. What do I do?

Thanks for helping