If people are still wondering about this I fixed it on my iphone 11 by going to settings->camera and switching from high efficiency to compatible.
Nothing else worked, but this did. I understand the colors are richer in high efficiency mode (paired with smaller sized files it would have been perfect), but I just found it very inconvenient and psychologically uncomfortable to see a crystal clear image right before taking the pic and then finding a blurry image at first in the photo app.
Yes you fix it by zooming in and out but it is annoying and when you exit the photo and select it again you have to go through the same process again.