Hello I'm using K2 2.8.0 with J3.8.8
I'm facing a new problem for few days : not all images associated with elements are displayed.
As you can see on this page for instance: www.surfingfrance.com/disciplines.html
An image has been uploaded for each article but some aren't displayed on the website.
What could have happened?

Hello,

You are using a lazyload scipt which loads the images instead.
Furthermore there are several JS error which can block the script from working properly.
Since these errors and the lazyload script are template specific and not a part of K2, I think the template's dev can provide more insight.