its not really a bug, this happens if clients are creating DMs with you tagged in it. This is a bug with the client sending the DMs, they are leaking tags. this is really bad for that client and the privacy of their users.

We can hide it under a dev option for sure though. It would take 2 seconds for anyone who wants to do this, we are open source. it's not at the top of our list to fix at the moment.