Pictures on the page from the phone are immersed only after it is updated. How to fix?

Question

css

Hello, there is a problem on the site iz-town.ru/rulonnyi-gazon.html
If you log in from an iPhone (I didn’t check on others), then on this page and some others the pictures are not loaded immediately, but are loaded only after the page is refreshed. What could be the reason and how to fix it? And how can this be debugged if the problem is only on phones. Before that, everything seemed to be ok, after adding adaptability, everything apparently flew. The site is static on html, without an engine, cms, etc.
Video example
Thank you.