I don`t know why I did not get any hits when searching HFU on 4085, but as Ron Howard points out there were plenty of reports, including now the latest when I was hearing it: X-FM:

https://www.hfunderground.com/board/index.php/topic,50482.0.html

Glenn

** NORTH AMERICA. 4085-AM, Jan 27 at
0250, DJ and rock music S9 but
noisy, by 0256 JBA carrier. Must be an
unidentified pirate I will
uplook later in HF Underground --- NO,
not a single log there now or
ever on 4085! (Glenn Hauser, OK, DX
LISTENING DIGEST)