Author sent me the old version and after deleting the new one and replacing with the old version, it is now working again.
Definitely something broke when it was updated.
Hi, @brightonseo.
As we have discussed, I believe the issue is a conflict between your theme (JNews) and ‘FIFU Settings > Image > Optimized Thumbnails > optimized secondary images’. Both make use of lazy load, which creates a not rare conflict.
For some unknown reason, this local 1px image is being rendered instead of the featured image: wp-content/themes/jnews/assets/img/jeg-empty.png.
Since JNews has no free version, I have to close this topic, as it’s not allowed to talk about commercial products in WordPress.org forums. But I will contact you if I find something else. Sooner or later, another user should report it, and I should be able to reproduce and fix the issue.
If someone else has the same conflict, please contact JNews support. The conflict can probably be solved from their side as well. They can download FIFU for free here. It should be version 4.8.5 (coming soon) or later.