#259 Links from GS appear as a "black box" on Mastodon

I had this pending of more research, as I was not sure if this was a GS or a Mastodon bug. But now that i have more info, here we go. When inserting a link in a post in GS, Mastodon shows a "black box", as if there were an image but couldn't display it ("Not available"): 1) GS post: https://gnusocial.net/notice/10027274 2) Mastodon post: https://social.wake.st/@liaizon/106976390471972505 Some minutes ago, @dansup answered this (second link): "Probably because GS is turning links into AP attachments (with `Document` type and `text/html; charset=UTF-8` mediaType, of which mastodon partially supports. If the mediaType was a photo or video, you'd see a preview image)"