> is it possible that at some point the computational photography makes a mistake and changes text?

Yes it is. I've seen that happen in real-time with the built-in camera viewfinder (not even taking a photo) on my mid-range Samsung phone, when I zoomed in on a sign.

It only changed one letter, and it was more like a strange optical warping from one letter to a different one when I pointed the camera at a particular sign in a shop, but it was very surprising to see.