That’s because Damus can’t properly render webp format images. The shortcut to nostr.build works perfectly.
Discussion
Wasn’t doing it earlier check my notes from this morning
Your other notes were png images. Your phone doesn’t change the file format. The only way to do that is to use an image editor. I use ezgif.com.
You can also paste the URL the shortcut creates in a browser to check the filename extension so you can see the image before you post it.