APP Name & APP Version (If your issue relates to the app): stock camera
======================================== Sample video shows the problem: https://youtu.be/BwCcqRoH-cQ Camera od shakeing suddenly, like continous AF could not catch the point. What is more - camera is generating specific noise. No matter what mode (video, pics, portrait, slow motion or another) and rotation. Sometimes just after open camera, sometimes after while - very random circumstances. Bug is increasingly, sometimes fix IT afret reboot sometimes after re-open app. I find this problem only after lasy ota updated, previous soft was free of this bug (i suppose). Or maybe theis is aomething with hardware?
The video looks like a problem with the camera hardware. If you want to try other methods, I have seen that someone has blocked the laser focus to fixed it, but is not guaranteed to be valid for ZenFone 6.
You can also try the wipe data/factory reset. If it still cannot be excluded, it is still recommended to the service center.