inconsistently direct link to image is not blurred if marked as NSFW

as the title says if the URL is to a direct link to an image. it is not blurred if post is marked as NSFW. does it both in app store and testflight.

edit:though lemmy.ml seems to be doing it properly (so i have removed the NSFW tag and linked image on this post). it appears it might be instance specific and maybe memmy trusts lemmy-ui a bit much. also i have noticed that a NSFW post will display properly then blur on load in a feed if visable on lemmy.ml