Thanks for the reply. This is really weird though.
I’ve tried running Safari in fullscreen with cleared cache and the problem persists. I’ve copy+pasted the image code from your demo site onto my site (thus the image was fetched from your site), and I experienced NO problem.
However, I also downloaded the image from your demo site, using the exact same code otherwise. So the image was the same, it was just fetched from elsewhere. Problem still there… I also tried loading a completely random image from the internet using the same code, same issue!
It’s as if the wordpress installation creates an image load problem only on my computer. If you can’t replicate it and it’s only on my device we don’t have a problem. But it’s really annoying. Well, I’m guessing there’s nothing to do about this?