Oh? I found his/her feedback in Untrusted Feedback, surely it's affected due to my trust list.
Suchmoon distrusts that user, and you trust suchmoon, so I'd say that the reason it's not showing.
As for the OP, I don't speak russian, so I have no clue why the feedback was left. Nevertheless, if you move this thread to the
Reputation board, and give some reason as to why the negative is uncalled for; you might get a chance of the user showing up to explain