Camera tick noise

I'm getting this clicking noise from my main 50MP camera whenever I open any camera app. Also, the 50MP lens centers itself once the camera app is open and OIS works fine, but it drops or slumps as soon as I close the app.It's not perfectly centered when the camera is not in use, and I can see the mechanical part, like the voice coil, from one side. Can you tell me if this is an issue or a normal thing?Is this a faulty camera?