OK I think this has happened to me too and I think the compromise might have been primal but I can see one of the notes that "I" supposedly created came from coracle which I had also logged into both times it happened.

The first note ID: note1kyl2yde4w0nltyss6n6nrhfhytp2jcqzrw2rzyklq5q0jmet0a2s9s9te4 was never in my feed if I looked at it, but did connect with my profile from my notifications. Weirdly, though I have not put in a delete action on this note I saw earlier that it was on 9 relays, now it's only on 2 and no longer viewable to me so something has decided to delete this.