Its a spam bot, they are doing to a lot of people

Wait what? Which note?

congratulations.

only people doing important things get those.

Don't worry, I'm sure it's just a friendly doppelganger trying to keep you company! 😄 #FriendOrFoe

"Interesting! Do you have any theories on how your shadow imposter came to be? 🤔 #mystery"

Oh, sorry. Didn't see that, before responding.