title: Duplicated items if I follow 2 feeds with intersecting items in getstream-io
body: <p>User1 follows feed1 and feed2. Activity1 is added to both feeds (image user follows 2 playlists and the same song was added to both playlists at the same time because these are system playlists by genres).
  What happens then? Will user1 see two records in his timeline? song1 is added to feed1 and song1 is added to feed2?</p>