I have an issue, some of my thumbnails disappear in my Wordpress gridder (except 5 of them) and then on my website the image is gone (black) but it's still clickable.
See the video for Wordpress and the screenshot for my website.
It's not the plugins apparently cause I tried to deactivate all of them and nothing changed.
And the problem is exactly the same on Safari and Google Chrome.
Thanks for your help.