It's actually a tricky pattern.
You turn up to a client and say "hey I'd like to follow someone."
And the client says "sure I'll just append that to your follow list". "Hey relays can I please has his follow list"
And then crickets, because relays are too slow or internet bad or something.
And then the client says "ok, looks like a new user with no follow list, I will create a new one with just this one follow on it!"
And then the relays shrug and say, new follow list here for user, I'll delete the other old list I have.
Is that a client issue or a relay issue?
Blame clients I guess.