I have seen a few members when using the -maxdDataRate command for a long time the DLM seems to get stuck onto a profile I can't verify this xreyuk, but if your pbParams look exactly the same then is crosstalk the issue as I seem to remember BE1 saying his signal attenuation was way higher than the line attenuation on his D1 band.
and with only 4 days since the powerline issues caused the DLM to take effect it's still kind of early as you may get a few more modem retrains until you get back to normal.