app publishes things like follows list which may contain large list of pubkeys. it also publishes encrypted drafts of posts. home feed probably does queries with list of pubkeys. you are following 1400 pubkeys, so these queries are probably quite large.
Discussion
yeah. i'd love a way to meaningfully reduce the count of people i follow but we're not building the right tools for list management yet. ive got bounties open for that
Does that happen on all relays? It could be a bug or Amethyst has sent a lot of event updates to that relay (if it had old info).