Viewing both thumb and zoom on a phone, I am either looking at a thumb too resolution to see the e.g. buildings that make up the text, or a zoom in so far that I am looking at a single building and have to scroll to see its part of the text.
Are you on a desktop or super screen or something?
Desktop (macbook Air fwiw). I've even tried zooming in and out to get intermediate values. They don't disappear till after I'm past full screen, and for some of them not ever (I mean the whole word falls off the screen but the negative space is clearly an identifiable letter). Amsterdam and Rome are the ones where I can lose text the soonest.
Are you on a desktop or super screen or something?