That's a new new one and unheard on all my years working with computers !
I have a simpler ddj-sb2 with a shielded cable (Faraday cage and all) and the same for all my external HDDs and even printers....
I can tell you I have had problem in HDD using even the cables that came with them, especially the USB only powered ones though.
Curious to see what pioneer says on this one.