Why aren’t my images showing on nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg if I post the url from my website?

This is a killer feature of nostr. They seem to be doing some sort of wrapping of the link. Started happening via their web app a few days ago.

Am I doing something wrong?