post images not showing in safari

Hi! I have an urgent problem. In my latest post (https://blomstrande.com/diy-3-olika-tekniker-att-gora-egna-stamplar/) the images wouldn’t show when the post was viewed in safari. Chrome works. Why is that?

I’ve had this problem once before but didn’t find a lasting solution (I think I just deleted and reposted the post). Since it has now occured once more I’d like a better solution though. Why is it that the images show in chrome but not in safari? And how can I prevent this from happening again?