This post was composed with a link to a Wired article:
https://lemmy.ohaa.xyz/post/1939209
Then in a separate step, the article was edited and an image was uploaded. The URL of the local image unexpectedly replaced the URL of the article. Luckily I noticed the problem before losing track of the article URL.
This annoys me. I usually want to replace the clickbait-y thumbnail youtube defaults to with a still that captures the essence of the video. I was frustrated to find out after adding both URL and image to a single post that the URL was overridden in favor of the image, leading to no interaction on those posts.