I see a lot of comments which include pictures when viewed from other apps, missing the pics entirely in Memmy. I’m not 100% sure but I think this happens with Imgur pictures?
Edit: it’s not only Imgur. I just wrote a comment to a post (using Memmy) where I attached a picture from my photos and while the pic shows on all other apps, it doesn’t show on Memmy, I see just the text of my comment