Why is Chrome ignoring cache-control?

Question

Nginx

In Nginx, expires max is set for images, I checked the headers, everything is in order.
Periodically (quite often), I observe how, when navigating the site, chrome re-downloads pictures, this is noticeable even on small ones, albeit very quickly, but they are displayed from top to bottom.
On medium and large, this is already significantly noticeable.
Tell me, in which direction to dig? Tweak something in Nginx, or search the Internet, why chrome can do this?