I usually browse under kbin.social/sub.
I noticed some posts from lemmyshitposts@lemmy.world and many others popping up in the sub-feed. The thing is, I’ve never subscribed to these magazines.
I even went to the magazine to check, whether I’ve subscribed accidentally, but I did not.
good hint, but nope… not subscribed to kbin.social either. Also checked /d/lemmy.world to make sure.