Images loading one on top of the other, on slow connection

[bogdandragomir]

When the Internet connection is slow, the images can be seen loading one on top of the other. It can be simulated in this flickity demo, choosing the Chrome Mid-tier mobile console and clearing the cache: https://codepen.io/desandro/pen/jrGWRQ

Can it not be seen like this, but more elegant?

Thank you, Bogdan