I am having the same problem with my 16 pro. I have followed all the directions given and have restored the device from back up which appears to clear the problem and within 24 to 48 hours later the camera app crashes and screen goes to black and back to home screen.
Absolutely fed up to the back teeth with this and the amount of hours I’ve now wasted talking to Apple support. Apparently, my device is from a bad batch. I have this officially from apple they have confirmed there is a bad batch of devices. They refused to send a new phone to replace my current one, but because I cannot afford to be without a phone, I have been forced into the only solution that I can find which is to buy and completely new device. I will set this up and see if the problem happens on the new one. In the meantime, I will return the current 16 pro as faulty.
This is led to considerable difficulty, anxiety and waste of time. Very shoddy performance from apple up to this point.
Wishing ever everyone else with this problem more or better luck.