If I drop a link to an image, the link will often remain as just a link, rather than generating the preview of the image alongside my comment and link to the URL.
Sometimes it works, but more recently it doesn't generate previews most of the time. Sometimes it's taken a few edits to get it to generate the preview. Other times I've found that dropping the link in first and then adding a comment generates the preview. Neither of these are consistent, however.
Any ideas what's going wrong and how it can be fixed?