Some early users of the devices have noticed that the rear camera's main lens vibrates uncontrollably in third-party apps with camera functions, such asSnapchat, and resulted in shaky video. The built-in camera app is unaffected by the issue.
It's not clear how widespread the problem is or what the underlying cause is, but it has been reported by users on a number of websites. There is a chance that the stabilizer is acting up due to a software bug, but this is just speculation.
One of the units that Miani was testing had a problem. Miani shared a video of the issue that shows the main lens vibrating uncontrollably, and he said the issue resulted in the lens being unable to focus in the Camera app. Miani said that he was able to exchange his phone for a new one at an Apple store.
If the issue is caused by a software bug, Apple could fix it in the next version of the operating system. We asked Apple if it was aware of and investigating the issue, but the company has yet to reply.
If you're worried about damage to the rear camera system, don't open the camera in apps that have it, until the matter is solved. We will let you know if Apple responds to this issue as it becomes available.