Lemmy Support

If any Lemmy devs look here, Mbin adds the image to the attachments array and uses a custom property (source) to add the url directly to the post instead of url (in addition to the entry in the attachments array which Mbin adds too). I don't know how you're getting the url, but I assume one of those two is the issue. Both can be fixed by the Mbin devs imo, but if the attachment array contents are the issue, I do recommend making Lemmy more robust there as the problem won't end with Mbin in the future. Other projects might also add additional objects to that array.