Hello.
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.
VIDEO
http://mateopicard.com/wp-content/uploads/2019/01/IMG_3208.TRIM_.mov
PHOTO
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.