I've always noticed it and I know it's deep fusion working in the background I don't know why it bothers people lol. I'm used to it only a few seconds on my 13 Pro Max to process the image.
" In practice, this involves the iPhone taking nine total photographs, and then the neural engine in the new ultra-powerful A13 Bionic chip essentially pulls out the best pixels in each image and reassembles a photo with more detail and less noise than you’d get from an iPhone without Deep Fusion."
This was explained when the iPhone 11 Pro came out.
" In practice, this involves the iPhone taking nine total photographs, and then the neural engine in the new ultra-powerful A13 Bionic chip essentially pulls out the best pixels in each image and reassembles a photo with more detail and less noise than you’d get from an iPhone without Deep Fusion."
This was explained when the iPhone 11 Pro came out.
