Reddit specific issue with NSFW subreddits

So I recently decided to try going pornfree. To this end, I unfollowed all NSFW subreddit from my Reddit account.

However, after having unfollowed all of these, some NSFW content still shows up but in a strange way. There's no subreddit name on top, it's r/ (blank) and when I try and open up the post, it either says "connection issues" or "there was an error please try again".

Does anyone know how to get rid of all of these? Thanks