May I ask which WordPress caching plugin are you using?
Furthermore, are you using APO for WordPress?
Have you checked your SSL certificate? Is it still valid?
May I ask what SSL option have you got selected under the SSL/TLS tab at Cloudflare dashboard for your domain ( Flexible, Full, Full Strict … )?
I see some errors at the Network tab of my Developer Console (F12) from my Web browser.
When I have AdBlock/AdGuard, I see it’s trying to load png or jp(e)g, but fails - due this extensions.
Otherwise, seems they appear fine from my end.
UPDATE: Not so well. I got NS_BINDING_ABORTED for few of them after waiting for a bit more.
If I open them in a new tab, they load fine and I do see “HIT” for the cache, while some of them fails when loading a page.
After I hit refresh on a webpage, all are loaded fine.
I do see that they are .jpg or .png, but therefore something adds .webp to them.
UPDATE 2: preload-me iso-lazy-load height-ready thumb-lazy-load-show iso-layzr-loaded
You are using some script/plugin for lazy-load and possible some JavaScript or CSS code for “iso” grid system, right?
But, the upper/parent HTML element has got class iso-item and set the attribute opacity to the value 0 - which is why they do not appear visible.
When I change to 1 or remove this, I see all of them fine.
Could you re-check if you have got Rocket Loader option enabled at Cloudflare Dashboard?
Furthermore, if yes, try to disable it.
Next, try to disable Auto Minify for CSS, HTML and JavaScript.
Nevertheless, Purge the Cache by using Purge Everything from the Cloudflare dashboard.
See if anything changes.
Maybe something is in a conflict or minified, but it shouldn’t be to make it work and appear on scroll behaviour of the visitor in his Web browser - > isotope.
