I think the other comments had some helpful options. Blorp is missing block instance, but I can add that. I thought we were handling NSFW correctly, but I think there is instance NSFW, community NSFW, and post NSFW. Then to complicate things, PieFed also supports marking posts as NSFW via post flair. It's possible we aren't filtering out NSFW somewhere that we should be.
That being said, I personally don't see any NSFW content on .world, so I'm surprised you are. Do you have NSFW toggled on in your Lemmy settings (https://lemmy.world/settings)? Currently NSFW has to be toggled via the official Lemmy UI. I may add that setting to Blorp at some point (iOS specifically won't allow it).
Excuse my rambling. Let me know if that makes sense or if you're still confused/think there is a bug.ย