I know there are other threads on this topic, but I wanted a more specific opinion. I have a brand-new S21 5G base model which had a fall not long after unboxing. There is a loud rattle coming from the camera that I can’t convince myself was there just beforehand. I’ve seen plenty of threads saying it’s a natural property of the focusing mechanism. However, it doesn’t completely go away when the camera is on, it just gets quieter. Moreover, most of the reports of loud rattling were from the Ultra, which I do NOT have. It does seem to be focusing fine, but I worry my untrained eyes might be missing the problem. Is there any reliable way I can test my cameras to see if there is a problem?