Usually when I see the issue I’d hop over to Primal to check and won’t see them. I can try checking other clients now that you mention it.
Discussion
I experience this issue occasionally with Amethyst and FreeFrom, I assume it's just because the information has to sync between multiple nodes in the p2p network
Yeah just unfollowed someone using #Damus and they are still on my feed. Switched over to #Primal and they were removed right away. I can test on more clients if needed. Let me know.