I still see lewd ones and weird celeb ones even tho i disabled nsfw. Wish those /c/'s would mark themselves nsfw as i really don't wanna block instance level. Also ani social is notorious for posting lewd ones without tag .
That is why e.g. lemmyNSFW is so hell bent on people marking their posts NSFW (on their instance). Else what you describe happens (filtering not working as intended).