[ludwik]

> Worse, after attempting to delete all chats and disable memory, I noticed that some information still seemed to persist.

I'm fairly sure "seemed" is the key word here. LLMs are excellent at making things up - they rarely say "I don't know" and instead generate the most probable guess. People also famously overestimate their own uniqueness. Most likely, you accidentally recreated a kind of Barnum effect for yourself.