I had a similar issue after making this Piefed account. I remember there was a pop-up asking me to pick some general topics I’m interested in. Then my feed was automatically filled, I guess with the relevant recommendations.

After successfully importing settings/subscriptions from my Lemmy account, my Piefed feed was still showing communities that weren’t part of my subscriptions. I realized that I had been automatically subscribed to them. I had to manually go through and unsubscribe one by one. It was tedious lol I still don’t know what the heck happened (idk if I answered the pop-up and unknowingly agreed to some kind of starter pack?). But it’s over now so whatever

EDIT: Oh ok, just checked! If you’re talking about it happening just now, then yes it’s also happening to me on Voyager. Home feed is showing communities I’m not subbed to. Everything looks normal on desktop.