iPhone 13 Pro camera issues

I've noticed various issues with the iPhone 13 Pro's main camera. First, it randomly blurs everything (like setting focus manually to 0 or focusing really close to a subject). In this state it won't change focus even if I tap on the screen to change focus. It even highlights faces being all blurred and still won't focus on the faces. Closing and re-opening the app fixes this momentarily.

Sometimes this issue happens when using 3x and tapping to focus (it auto-switches to main camera and fails to focus anything).

I've also experienced focus hunting with subjects at a "medium" distance. The focus would shift to the background and back to the subject rapidly and nonstop. I must say that I've only experienced these issues at night, indoors with artificial lighting.

Finally, when comparing the main camera with my previous iPhone X, I've noticed that the X has more detail. The 13 is better overall in dynamic range, low light performance, etc... but X seems clearer. And the X can also focus closer with the main camera; the 13 can technically focus even closer with ultra wide, but the quality is worse compared to the X main camera.